idocrase
idocrase (vesuvianite) A mineral, with the formula Ca10(Mg,Fe)2Al4Si9O34(OH,F)4, closely related to the garnet group; sp. gr. 3.4; hardness 6.5; green; normally massive or granular; occurs in contact-metamorphosed (see THERMAL METAMORPHISM) limestones along with grossular, scapolite, and wollastonite.
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Epidote , Epidote
epidote (pistacite) A rock-forming mineral Ca2(Al2Fe3+)Si3O12(OH) and a member of the epidote group of minerals, which includes zoisite, clin… Chrysoberyl , chrysoberyl Mineral, BeAl2O4; sp. gr. 3.5–3.8; hardness 8.5; orthorhombic; various shades of green or greenish-yellow; white streak; vitreous lustre;… Anglesite , wulfenite Mineral, PbMoO4; sp. gr. 6.5–7.0; hardness 3; tetragonal; orange-yellow, olive-green, or brown; white streak; resinous lustre; crystals usu… Muscovite , muscovite
muscovite An important rock-forming mineral and member of the mica group with composition K2Al4[Si3AlO10]2(OH,F)4 (see MICAS); when K is re… Green Turtle , green turtle (Chelonia mydas) See CHELONIIDAE.
Chelonia mydas (green turtle) See CHELONIIDAE. Hornblende , Hornblende
hornblende An important rock-forming silicate mineral and member of the amphiboles, particularly the calcium-rich monoclinic amphiboles; i…
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idocrase