epidote


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ep·i·dote

 (ĕp′ĭ-dōt′)
n.
A lustrous yellow, green, or black mineral, Ca2(Al, Fe)3(SiO4)3OH, commonly found in metamorphic rock.

[French épidote, from Greek epididonai, to give in addition, increase (from the greater length of its crystals compared with those of related minerals) : epi-, epi- + didonai, to give; see dō- in Indo-European roots.]

ep′i·dot′ic (-dŏt′ĭk) adj.

epidote

(ˈɛpɪˌdəʊt)
n
(Minerals) a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic crystalline form: common in metamorphic rocks. Formula: Ca2(Al,Fe)3(SiO4)3(OH)
[C19: from French épidote, ultimately from Greek epididonai to increase, from didonai to give; so called because two sides of its crystal are longer than the other two sides]
epidotic adj

ep•i•dote

(ˈɛp ɪˌdoʊt)

n.
a mineral, hydrous calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals or in masses.
[1800–10; < French épidote < Greek *epidotós given besides, increased]
ep`i•dot′ic (-ˈdɒt ɪk) adj.
Translations
References in periodicals archive ?
Alteration is dominated by strong potassic alteration and pervasive silicification locally accompanied by albite, chlorite and epidote. Located 30 kilometres apart, the zones are spatially associated with two major subparallel structures suggesting significant deep-rooted regional-scale systems.
Malik Saleem said that Pakistan has enormous wealth of expensive gems such as ruby, emerald, tourmaline, garnet, topaz, peridot, aquamarine, spinel, pargasite, diopside, moonstone, pink topaz, sapphire, zircon, feldspar, agate, serpentine jade, epidote, pink beryl (morganite), purple beryl, sphene, zoisite, lapis lazuli, turquoise, and kunzite etc.
Malik Shahid informed that Pakistan has enormous wealth of expensive gems such as ruby, emerald, tourmaline, garnet, topaz, peridot, aquamarine, spinel, pargasite, diopside, moonstone, pink topaz, sapphire, zircon, feldspar, agate, serpentine jade, epidote, pink beryl (morganite), purple beryl, sphene, zoisite, lapis lazuli, turquoise and kunzite etc and Pakistan could earn huge foreign exchange from exports of gems and jewelry.
In the complex microprophries is very fine grained with orthoclase, perthite, quartz, biotite, magnetite, epidote as major minerals.
Speakers from Ministry of Commerce and TDAP informed the audience that Pakistan has enormous wealth of expensive gems such as ruby, emerald, tourmaline, garnet, topaz, peridot, aquamarine, spinel, pargasite, diopside, moonstone, pink topaz, sapphire, zircon, feldspar, agate, serpentine jade, epidote, pink beryl (morganite), purple beryl, sphene, zoisite, lapis lazuli, turquoise, and kunzite etc.
The alteration halos are composed of chlorite [+ or -] calcite [+ or -] epidote, in the diorites and quartz diorites of Segovia batholith and of muscovite [+ or -] illite + quartz + pyrite in the black shales of Segovia sedimentary rocks.
Accessory minerals: ilmenite, epidote, zircon and apatite occupy a small fraction of the volume.
The Fuzishan deposit also contains different kinds of gangue minerals, which are dominated by skarn minerals such as garnet, diopside, actinolite, and epidote (Figures 5(g) and 5(h)), and with relatively less amounts of quartz, calcite, anhydrite, K-feldspar, chlorite, and kaolinite (Figures 5(i)-5(l)).
The conditions of metamorphism of the metabasites of the Arquia Complex in all lithotypes studied along the Central Cordillera reached the amphibolite facies for the garnet-amphibolite without garnet and greenschist facies for the epidote actinolite schists.
Epidote (1.3-1.7%) wasasubhedral grains; optical studies identified both zoisite and clinozoisite.
The wide-range of gemstones including sapphires from Kashmir, emeralds from Swat, rubies from the northern areas and pink topazes from Katlang, Mardan, and good quality zircon, different varieties of quartz, aquamarine, tourmaline, sphene, spinel, zoisite apatite, epidote, morganite, garnet, scapolite, clino zoisite, xenotime, bastnaesite, peridot, nephrite, serpentine, red agate, diopside, pargasite, amethyst, scheelite, pollucite, chrome diopside and kunzite are found in mountainous belt from South Waziristan to Chitral, makes the country significant in the mineral world.