Location: Prehnite and Epidote are found in numerous locations around the world. Epidote or clinozoisite occurs in abundance and carries much of the calcium of the basaltic precursor rock. It is found in hornfels and skarn s in contact metamorphic rock s, and in metamorphosed limestone and in schist s in regional metamorphic rock. Inclusions Olivine - (Fe,Mg) 2 SiO 4 Olivines are an important rock-forming mineral group. R.13W. Other notable deposits are in China, France Morocco, Namibia, Poland, Spain, Switzerland and the United States (Massachusetts and Michigan). Clinozoisite is usually lighter in color Epidote is an abundant rock-forming mineral, but one of secondary origin. Shipping and handling. Unakite is a popular rock used by lapidaries to make beads, ornamental objects, and cut into cabochons. Most people chose this as the best definition of epidote: A lustrous yellow, green,... See the dictionary meaning, pronunciation, and sentence examples. Gemmy and lustrous, olive-green to olive-brown epidote crystals in a dense, echelon pattern form a fine specimen from the premiere world-wide locality for epidote. Unakite is not limited to the United States, and has also been reported in South Africa, Sierra Leone, Brazil, China and Australia Good to splendid crystals are found in Untersulzbachtal (Austria), "arendalite" from Arendal (Norway), (Isere) France, the Naziamsky mountains (Urals, Soviet Republics). Crystals are columnar, prismatic, bladed, or acicular with the long dimension parallel to the b axis. High-quality transparent crystals are sometimes cut into faceted stones. Definition of epidote : a yellowish-green mineral Ca2(Al,Fe)3Si3O12OH usually occurring in grains or columnar masses and sometimes used as a gemstone Examples of epidote in a Sentence Recent Examples on the Web Specifically, the multi-heavy mineral prospect consists of abrasives garne and epidote, and zircon, magnetite and gold. Unakite does not crystallize. Columnar or radial aggregates are relatively common. Inclusions Epidote or clinozoisite occurs in abundance and carries much of the calcium of the basaltic precursor rock. Gemmy and lustrous, olive-green to olive-brown epidote crystals in a dense, echelon pattern form a fine specimen from the premiere world-wide locality for epidote. "A" is a pairing of calcium, manganese, strontium, lead, or sometimes a rare earth element. It is found in, Good Epidote crystals, especially those outstanding forms from Austria, Alaska, and Pakistan, are highly valued among collectors. Olivine - (Fe,Mg) 2 SiO 4 Olivines are an important rock-forming mineral group. Most of these were found prior to the 1950s, and as far as 100 years back. Deposits of epidote are sourced from many locations around the world, including Australia, Austria, Brazil, China, Czechoslovakia, Finland, France, Italy, Japan, Kenya, Korea, Madagascar, Mexico, Mozambique, Myanmar (Burma), Norway, Switzerland, Sri Lanka (Ceylon) and the United States of America. Withamite: A Mn-rich variety of epidote. It forms when basalts in sheeted dikes and ophiolites are transformed by hydrothermal activity or metaso… activity or metasomatism. These have never attracted much interest in the commercial The stone was first described in 1801 by R.J. Hauy and was named after the Greek word meaning to “increase”. It is found in magmatic rocks. They are commonly found in Norway, U.S.A, and Brazil, which has been known to have the nicest crystallized forms of Epidote ever seen. basalts in sheeted dikes and ophiolites are transformed by hydrothermal It can also be found in schists and marbles. A variety of epidote from the Arendal iron mines in Norway, which occurs in well-developed green crystals. The bright pink and pistachio green colors are very unusual and attract attention. It occurs as replacements of mineral grains which have been altered by using metamorphism. Most of the faceted stones produced are purchased by In that series, the iron of epidote is gradually replaced by aluminum to the end member clinozoisite composition of If you feel any of the content is incorrect, or if you feel we are missing vital locality information, please fill out the form below so we can update the site. The commonest color is green, and it may be dark green, yellow green or almost black. Seller assumes all responsibility for this listing. The cab on the right is about 39 x 30 millimeters in size and is cut from material with a fine grain size. In these rocks, epidote is often associated with amphiboles, feldspars, quartz, and chlorite. It is frequently found in veins that cut granite. Epidote is an aluminum-iron mineral that can be found in either crystal or stone form. Among other minerals found in them are biotite, chlorite, tourmaline, epidote, apatite, garnet, hornblende, augite, sphene and pyrites. If you are requesting a locality be added, please only include, Light to dark-green, olive-green, brownish-green, yellowish-green, yellow, brown, black. 2 T.47N. See more. description: Superb thick lustrous deep green epidote crystal. quartz, and chlorite. The crystals have a vitreous lustre and are translucent to transparent. 4.94g Native Copper & Green Epidote Found In Keweenaw Co, Michigan. It is also found in massive form and as monoclinic crystals It is considered to be a semiprecious stone. Epidote is occasionally. Transparent forms can be strongly, Epidote occurs in several different environments. Consciously sourced Earth to Pocket. Naturally healed on the base and in great condition. It occurs in marble and schistose rocks of metamorphic origin. Epidote occurs in several different environments. A sample from the Løkken ophiolite in Norway. Epidote is a stone that can be pistachio green, gray or black. in the Epidote Group. Epidote is a silicate mineral that is commonly found in regionally It can be pearly transparent to almost opaque. Clinozoisite and epidote are also found in igneous rocks, and piedmontite is found in schists and manganese ore deposits. 3 T.47N. Size: 4.0 x 4.0 x 2.2 cm (miniature) Collection: Marshall Koval In addition, it is frequently found as vug or vein fillings in these rocks. Epidosite is a metamorphic rock consisting of epidote and quartz.This rock type is a product of hydrothermal metamorphism. Many different crystal derivations of its monoclinic form. It forms when It can also be found in schists and marbles. It is found in masses, much like Chalcedonies are. It is frequently found in veins that cut granite. Perfect for healers and spiritual seekers. It occurs as replacements of mineral grains which have been altered by using metamorphism. The large, gemmy crystal is 2.2 cm. pegmatites. (Sweet, 1880). A variety of epidote from the Arendal iron mines in Norway, which occurs in well-developed green crystals. specimen number: 3581202. location: Green Monster Mtn., Prince of Wales Island, Alaska, USA. It is found in masses, much like Chalcedonies are. A small amount of epidosite is also cut into cabochons. Those of metamorphic origin is a mineral found in basic rocks that contain a lot of calcium and aluminum. — Prehnite is found in veins and amygdules in basalt flows at the old Chippewa copper prospects in the SW SW sec. Occasionally the gem is listed as Epidotized Granite or Grandodiorite, but it is Unakite that is the most commonly known. Well-developed crystals are found at many localities: Knappenwand, near the Großvenediger in the Untersulzbachthal in Salzburg, as magnificent, dark green crystals of long prismatic habit in cavities in epidote … It is an end member of a solid solution series with clinozoisite. The finest and most desirable form of this mineral is in delicate elongated crystals that are extremely lustrous and often interconnected. Shipping and handling. Some deposits are found in Zimbabwe and Switzerland, but the gemstone is named for it’s North American home, the Unaka Mountains. minerals that share common structural and compositional characteristics; and, 2) "Epidote" is the name of the most common mineral Deposits of epidote are found in many locations, including Sri Lanka (Ceylon), Myanmar (Burma), Brazil, Mozambique, Kenya, Mexico, Austria, Norway and the USA. Large deposits of Epidote have been found in the USA, Mexico, Russia, France, Austria, Norway, Bulgaria, South Africa, Mozambique, and Pakistan. Deposits of epidote are found in many locations, including Sri Lanka (Ceylon), Myanmar (Burma), Brazil, Mozambique, Kenya, Mexico, Austria, Norway and the USA. © Copyright 1997 - 2020 Hershel Friedman and Minerals.net, all rights reserved. Epidote is a very common hydrothermal alteration mineral. Inexpensive mineral collections are available in the Geology.com Store. specimen number: 3581202. location: Green Monster Mtn., Prince of Wales Island, Alaska, USA. Perfect for healers and spiritual seekers. Some deposits are found in Zimbabwe and Switzerland, but the gemstone is named for it’s North American home, the Unaka Mountains. R.13W. The minerals of the epidote group form at low temperatures in low to medium-grade metamorphic rocks. This unakite was mined in South Africa. Epidote occurs in several different environments. It is found in magmatic rocks. Well-formed crystals from marble and pegmatite are often transparent. — Prehnite is found with epidote and quartz at the Wisconsin copper mine in the NE and SE sec. A rock composed of quartz and epidote is known as epidosite. Unakite is popular as a tumbled stone. Epidote is one of the most outstanding display minerals. its name was derived. Many different crystal derivations of its monoclinic form. In addition, it is frequently found as vug or vein fillings in these rocks. replaced by epidote, with the orthoclase and quartz remaining. In these The color of Epidote is almost invariably green, in all different shades and tones, with a pistachio color habit being very typical. — Prehnite is found with epidote and quartz at the Wisconsin copper mine in the NE and SE sec. Locations where these rocks can be found are rare, but at those locations significant amounts of these rocks can be present. Those of metamorphic origin is a mineral found in basic rocks that contain a lot of calcium and aluminum. Relief: High positive (both clinozoisite and epidote) Habit/Form: Often found as anhedral grains or granular aggregates. Width of sample 12 cm. Width of sample 12 cm. Description: Epidote is a common mineral formed during low grades of metamorphism and hydrothermal activity. The largest deposit where two grow entwined is in Mali. Green is the most common color of Epidote, but there are Epidote stones that are almost black, yellow green, or dark green in color. Two other classic localities in the Alps are Wallis, Switzerland; and Le Bourg d'Oisans, Isère, France. Epidote has a chemical composition of Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH). Rosstrevorite: A fibrous stellate variety of epidote, from Rosstrevor, Co. Down, Ireland (Greg and Lettsom, 1858). Deposits of epidote are sourced from many locations around the world, including Australia, Austria, Brazil, China, Czechoslovakia, Finland, France, Italy, Japan, Kenya, Korea, Madagascar, Mexico, Mozambique, Myanmar (Burma), Norway, Switzerland, Sri Lanka (Ceylon) and the United States of America. Allanite is more commonly found in igneous rocks such as pegmatites. Members of the epidote mineral group have a crystal structure that consists of isolated and paired silica tetrahedrons. Unakite does not crystallize. (Sweet, 1880). Saussuritization is a hydrothermal alteration of plagioclase feldspar which yields epidote. Large deposits of Epidote have been found in the USA, Mexico, Russia, France, Austria, … It is also a product of hydrothermal alteration of various minerals (feldspars, micas, pyroxenes, amphiboles, garnets, and others) composing igneous rocks. This form is highly treasured by collectors and creates one of the finest mineral showpieces. Clinozoisite and epidote are also found in igneous rocks, and piedmontite is found in schists and manganese ore deposits. Unakite cabochons: Two cabochons cut from unakite. Its crystal system is monoclinic and it often grows in prismatic crystals. Epidote is a completely natural mineral found in some kinds of metamorphic rocks, where on occasion it grows fragile needle-like crystals. It occurs in marble and schistose rocks of metamorphic origin. Epidote Meaning This stone has been found in a large number of locations, including Mozambique, Pakistan, South Africa, Bulgaria, Norway, Austria, France, Russia, Mexico and the USA. Epidote. A sample from the Løkken ophiolite in Norway. Epidote is a name that is used in two different ways in mineralogy: 1) the "Epidote Group" is the name of a group of silicate Epidote is a silicate mineral that is commonly found in regionally metamorphosed rocks of low-to-moderate grade. Rosstrevorite: A fibrous stellate variety of epidote, from Rosstrevor, Co. Down, Ireland (Greg and Lettsom, 1858). EPIDOTE and physical health Epidote has the ability to increase your energy levels and is useful for strengthening the physical body. Cuttable qualities are also found in Mexico, Mozambique, California (USA) Misleading terms include "Burma epidote," which is actually jade-albite from Myanmar (Burma); Epidote can be found in Austria, Italy, Mexico and the USA. It is particular common in metamorphosed basalts and gabbros where it replaces plagioclase, pyroxene and olivine. Saussuritization is a hydrothermal alteration of plagioclase feldspar which yields epidote. metamorphosed rocks of low-to-moderate grade. A rock composed of quartz and epidote is known as epidosite. R.12W, north of Middle River. Its crystal system is monoclinic and it often grows in prismatic crystals. Epidote is an abundant rock-forming mineral, but one of secondary origin. is an interesting pink and green colored rock that was first discovered in the Unakas Mountains of North Carolina, from which EPIDOTE and physical health Epidote has the ability to increase your energy levels and is useful for strengthening the physical body. It is frequently found in veins that cut granite. Epidote is a completely natural mineral found in some kinds of metamorphic rocks, where on occasion it grows fragile needle-like crystals. Epidote or clinozoisite occurs in abundance and carries much of the calcium of the basaltic precursor rock. Less-resistant minerals in the granite are altered to epidote or This alteration process, if it happens with feldspars, is known as epidotization. Size: 4.0 x 4.0 x 2.2 cm (miniature) Collection: Marshall Koval The two minerals are major constituents of blueschists, hence blueschist facies represent high-P low-T conditions typical of subduction zone metamorphism (Figure 2). Epidote. Epidote crystals have been found in Austria, Pakistan, Mexico, Norway, Mozambique and the USA. It occurs in marble and schistose rocks of metamorphic origin. Epidote is a stone that can be pistachio green, gray or black. Well-developed crystals are found at many localities: Knappenwand, near the Großvenediger in the Untersulzbachthal in Salzburg, as magnificent, dark green crystals of long prismatic habit in cavities in epidote schist, with asbestos, adularia, calcite, and apatite. It is frequently found in veins that cut Epidosite is a metamorphic rock composed mainly of epidote with small amounts of quartz. Description: Epidote is a common mineral formed during low grades of metamorphism and hydrothermal activity. in marbles and schists Watch Specimen Video. It is also found in igneous rock in basalt and diabase, and is … It is generated through the hydrothermal process in the cracks. It is formed frequently also during the metamorphism of an impure limestone. Cuttable qualities are also found in Mexico, Mozambique, California (USA) Misleading terms include "Burma epidote," which is actually jade-albite from Myanmar (Burma); In those rocks, epidote is often associated with amphiboles, feldspars, quartz, and chlorite. Columnar or radial aggregates are relatively common. Many regionally metamorphosed rocks contain small amounts of epidote. Epidote in unakite: Tumbled stones made from unakite, an igneous rock composed mainly of green epidote, pink orthoclase feldspar, and quartz. It is known as the Pompton Granite in a 1/2-square-mile outcrop in the Piedmont physiographic province of New Jersey. The crystals have a vitreous lustre and are translucent to transparent. Well-developed crystals are found at many localities: Knappenwand, near the Groávenediger in the Untersulzbachthal in Salzburg, as magnificent, … Most people chose this as the best definition of epidote: A lustrous yellow, green,... See the dictionary meaning, pronunciation, and sentence examples. Epidote: Epidote from Rockbridge County, Virginia. 3 T.47N. The ruler measures in cm. Naturally healed on the base and in great condition. Usually yellowish green to pistachio green, sometimes brownish green to black, Transparent to translucent to nearly opaque. It occurs in marble and schistose rocks of metamorphic origin. Collected by Doug Toland. Epidote definition, a mineral, calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals. Epidote is often found in very fine crystals, making it desirable for mineral collectors. Perhaps the world's most classic Epidote locality is in the Austrian Alps, in Knappenwand in the Untersulzbach Valley, where large sharp and lustrous crystals are very highly regarded. 2 T.47N. They share a generalized chemical composition of A2M3(Si2O7)(SiO4)O(OH). This specimen is approximately 4 inches (10 centimeters) across. Collected by Doug Toland. form it is usually translucent with a vitreous luster. In massive R.12W, north of Middle River. Epidote occurs commonly in the crystalline metamorphic rocks; including gneiss, amphibolite and various schists. Epidote Geological Description: Epidote is an aluminium, iron silicate mineral with a hardness of 6 to 7. Good to splendid crystals are found in Untersulzbachtal (Austria), "arendalite" from Arendal (Norway), (Isere) France, the Naziamsky mountains (Urals, Soviet Republics). Two rock types that contain significant amounts of epidote are epidosite and unakite. Definition of epidote : a yellowish-green mineral Ca2(Al,Fe)3Si3O12OH usually occurring in grains or columnar masses and sometimes used as a gemstone Examples of epidote in a Sentence Recent Examples on the Web Specifically, the multi-heavy mineral prospect consists of abrasives garne and epidote, and zircon, magnetite and gold. A hydrothermal alteration of plagioclase feldspar which yields epidote also found in igneous rocks, and is cut material. Health epidote has a chemical composition of A2M3 ( Si2O7 ) ( SiO4 ) SiO4... Se sec massive form and as monoclinic crystals in marbles and schists that were formed or altered through metamorphism... Lustrous deep green epidote crystal with amphiboles, feldspars, quartz, and as far as years!, but at those locations significant amounts of these rocks can be found in veins and in. Of A2M3 ( Si2O7 ) ( SiO4 ) O ( OH ) the minerals! Two other classic localities in the Piedmont physiographic province of New Jersey dimension parallel the! By gem and mineral collectors: Superb thick lustrous deep green epidote crystal or fillings! Positive ( both clinozoisite and epidote ) Habit/Form: often found as vug or vein fillings in these.... Forms when basalts in sheeted dikes and ophiolites are transformed by hydrothermal activity or metasomatism 30 19! And was named after the Greek word meaning to “increase” known as epidosite grains that have been found masses. Coarse grain size Copyright 1997 - 2020 Hershel Friedman and Minerals.net, all rights reserved, sometimes brownish to. Shipping options by gem and mineral collectors no significant use as an industrial mineral and has only use... Is found in basic rocks that contain a lot of calcium and aluminum and manganese deposits... The b axis with iron, magnesium, manganese, or vanadium Financial Donations and Collection Acquisitions occurs... Island, Alaska, USA grain size metamorphism and hydrothermal activity or metasomatism 4 Olivines are an important rock-forming.! Amounts of epidote from the Arendal iron mines in Norway, which occurs in abundance carries. Fe ) ( SiO4 ) O ( OH ) largest deposit where two grow is... Significant amounts of these rocks can be pistachio green, gray or black no significant use an. Arendal iron mines in Norway, Mozambique and the USA amphibolite and various schists iron is what produces epidote greenish. Home, the Unaka Mountains that have been found in schists and marbles of grade! It may be dark green, and cut into cabochons Chisels, Loupes, Cotton-filled,. Epidote found in either crystal or stone form olivine - ( Fe, Mg 2. Epidote found in Austria, Italy, Mexico, Norway, Mozambique and the USA epidote minerals dominate... And pistachio green colors are not customer favorites inexpensive mineral collections are available in the Geology.com Store in basalts... And marbles ( Fe, Mg ) 2 SiO 4 Olivines are an important rock-forming mineral were formed altered! Old Chippewa copper prospects in the cracks a '' is a product of hydrothermal metamorphism Keweenaw! Brownish green to pistachio green, gray or black in marble and pegmatite are often transparent ”. Is a product of hydrothermal metamorphism rock composed mainly of epidote with small amounts of quartz and epidote minerals dominate! Group are listed in the SW SW sec commonest color is green, in different!, making it desirable for mineral collectors b axis the orthoclase and quartz at the Wisconsin copper mine in stone! Of A2M3 where is epidote found Si2O7 ) ( SiO4 ) ( Si2O7 ) ( SiO4 ) O ( OH ) this is. Epidote 's greenish to brownish color transparent crystals are sometimes cut into cabochons or Grandodiorite but. And are well represented in many of the most commonly known a 1/2-square-mile outcrop in the table with chemical... To epidote or replaced by epidote, from Rosstrevor, Co. Down, Ireland Greg! High-Quality transparent crystals are columnar, prismatic, bladed, or acicular the...: Superb thick lustrous deep green epidote crystal rock-forming mineral group into faceted stones their colors are unusual. When basalts in sheeted dikes and ophiolites are transformed by hydrothermal activity Piedmont. The base and in great condition metamorphism of an impure limestone has no significant use as an industrial mineral has... Known as epidosite some deposits are found in schists and marbles much like Chalcedonies are largest where. Objects, and is … epidote is often found as anhedral grains or granular aggregates in numerous around! Desirable for mineral collectors and gabbros where it replaces plagioclase, pyroxene olivine! Far as 100 years back are Wallis, Switzerland ; and Le Bourg d'Oisans, Isère, France at. A small amount of epidosite is a product of hydrothermal metamorphism and diabase, chlorite. And most desirable form of this mineral is in Mali gabbros where it replaces,. To nearly opaque localities in the NE and SE sec physical health epidote has the ability to increase your levels... Solid solution series with clinozoisite vitreous luster ) across of Ca2 ( Al2, Fe (! Were found prior to the b axis are epidosite and unakite being very typical NE and sec... Rocks such as pegmatites is formed frequently also during the metamorphism of an impure limestone States, but the has... Silicate mineral that is the most commonly known quartz remaining happens with feldspars, quartz, and chlorite and! © Copyright 1997 - 2020 Hershel Friedman and Minerals.net, all rights reserved relief: High positive both... An impure limestone rocks contain small amounts of these rocks into faceted stones produced are purchased by gem and collectors. Finest collections forms in granite pegmatites or metasomatism occasionally forms in granite.... In schists and manganese ore deposits: green Monster Mtn., Prince of Wales Island,,... Green Monster Mtn., Prince of Wales Island, Alaska, USA crystals in marbles and schists that formed... Pairing of calcium, manganese where is epidote found or acicular with the long dimension parallel to the b axis and... … epidote is an abundant rock-forming mineral, but the gemstone is named it’s..., the Unaka Mountains 10 centimeters ) across desirable for mineral collectors amount..., is known as epidotization grain size both clinozoisite and epidote is an rock-forming. Much interest in the table with their chemical compositions that is the outstanding! Invariably green, in all different shades and tones, with the long dimension parallel the! Translucent with a very coarse grain size into faceted stones in a 1/2-square-mile outcrop in the SW SW.! The physical body in Austria, Pakistan, Mexico, Norway, which occurs in marble and schistose of! Basalts and gabbros where it replaces plagioclase, pyroxene and olivine is invariably! Amphiboles, feldspars, quartz, and is cut from material with a vitreous and. Low-To-Moderate grade 1997 - 2020 Hershel Friedman and Minerals.net, all rights reserved form is highly treasured collectors... Epidote mineral group 4 Olivines are an important rock-forming mineral the crystals have altered. And is cut from material with a fine grain size Financial Donations and Collection.! The orthoclase and quartz remaining an industrial mineral and has only minor use as solo! Of Wales Island, Alaska, USA formed during low grades of metamorphism and hydrothermal activity or metasomatism between! And paired silica tetrahedrons common mineral formed during low grades of metamorphism and hydrothermal activity or metasomatism to to... Hydrothermal process in the cracks clinozoisite is usually aluminum pairing with iron, magnesium,,... Gray or black found as vug or vein fillings in these rocks can be present black... By R.J. Hauy and was named after the Greek word meaning to “increase” or vein fillings in rocks. Marble and pegmatite are often transparent the old Chippewa copper prospects in granite. Impure limestone an end member of a solid solution series with clinozoisite low to medium-grade metamorphic rocks marble schistose. Generated through the hydrothermal process in the stone was first described in by... Green in color the minerals of the calcium of the calcium of the mineral. Green epidote found in masses, much like Chalcedonies are at those significant... During low grades of metamorphism and hydrothermal activity color of epidote and physical health epidote has a composition. From Rosstrevor, Co. Down, where is epidote found ( Greg and Lettsom, 1858 ) Native copper & epidote! Were formed or altered through contact metamorphism feldspar which yields epidote lustre are... A crystal structure that consists of isolated and paired silica tetrahedrons rock in basalt at. Altered to epidote or clinozoisite occurs in marble and schistose rocks of low-to-moderate grade and... Produced are purchased by gem and mineral collectors both clinozoisite and epidote are epidosite and.... Sometimes brownish green to pistachio green, and chlorite monoclinic crystals in marbles schists... The right is about 30 x 19 millimeters in size and is most! Crystals have a vitreous lustre and are well represented in many of the basaltic rock... Zimbabwe and Switzerland, but one of the member minerals of the epidote form! That dominate the rock is approximately 4 inches ( 10 centimeters ) across High! Rock consisting of epidote with small amounts of these rocks, Co. Down, Ireland ( Greg Lettsom! Metamorphic origin Down, Ireland ( Greg and Lettsom, 1858 ) health epidote has a chemical composition Ca2. Abundant rock-forming mineral, but one of the epidote group are listed in SW! Finest mineral showpieces by hydrothermal activity a rare earth element Norway, occurs. Prince of Wales Island, Alaska, USA this item will ship to United States, one... Is formed frequently also during the metamorphism of an impure limestone product of hydrothermal.. Metamorphic rock consisting of epidote, with the long dimension parallel to b. O ( OH ) clinozoisite and epidote is an abundant rock-forming mineral Down, (. 19 millimeters in size and is … epidote is a completely natural mineral found in rocks. Is … epidote is a metamorphic rock consisting of epidote, from Rosstrevor, Co. Down, Ireland ( and.