zoisite

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Scope note
A natural silicate of calcium and aluminum silicate, Ca2Al3(SiO4)3OH, characteristic of regional metamorphism and of hydrothermal alteration of igneous rocks. A member of the epidote group of nesosilicates, it is a lustrous transparent to translucent stone with color ranging grayish-white, peach, pink (thulite), blue (tanzanite) or green. Named for Baron Zois van Edelstein (1747-1819).
zoisite
Accepted term: 27-May-2024