pyrope
pyrope Member of the garnet group of minerals, Mg3Al2(SiO4)3; sp. gr. 3.51; hardness 6.0–7.5; cubic; dark red, pink-red, or black; vitreous lustre; crystals (dodecahedra, also occurs massive; occurs in highgrade metamorphic rocks (e.g. eclogites) and deep-seated igneous rocks (e.g. garnet peridotites), which are often mantle derived, although the pyrope molecule occurs to a variable extent in most almandines; it is also distributed in alluvial deposits. Transparent crystals are used as gemstones. The name is derived from the Greek puropos, meaning ‘fiery eyed’.
More From encyclopedia.com
ilmenite , ilmenite Mineral, FeTiO3; sp. gr. 4.5–5.0; hardness 5–6; trigonal; black; black to brownish-red streak; sub-metallic lustre; crystals normally thick… Diorite , diorite •Hamite, samite •marmite • Semite • Vegemite •eremite • Hashemite • Fatimite •chromite • Edomite • sodomite •stalagmite • Elamite • dolomite… Analcime , analcime (analcite) Mineral, Na(AlSi2O6)H2O; sp. gr. 2.2–2.3; hardness 5.0–5.5; cubic; can be colourless or white, with grey, red, and greenish tints… Hornblende , Hornblende
hornblende An important rock-forming silicate mineral and member of the amphiboles, particularly the calcium-rich monoclinic amphiboles; i… Pyrrhotite , pyrrhotite Mineral, FeS; sp. gr. 4.6–4.7; hardness 3.5–4.5; hexagonal; bronzeyellow but darkens rapidly to reddishbrown on exposure; greyish-black st… xenolith , xenolith An inclusion or enclave of a preexisting rock in an igneous rock. Xenoliths are often derived from the country rocks that have been invaded…
You Might Also Like
NEARBY TERMS
pyrope