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Zoisite
- Translations : Zoisit, Zoisiet, Zoisiitti, Zoïsite, Illuderit, Zoizit, 灰簾石, Zoisyt, Цоизит, 黝帘石, Zoisita, 黝簾石
- Synonym : illuderite, lime-epidote, orthozoisite, unionite
- Etymology : Originally named saualpite for the locality Saualpe in Carinthia, Austria.
- Discovery: 1805 by Werner
Gemological data
- Chemical formula : Ca2Al3(Si2O7)(SiO4)O(OH)
- Hardness (Mohs) : 6-7
- Density : 3.35
- Refractive index : nα = 1.696 - 1.700 nβ = 1.696 - 1.702 nγ = 1.702 - 1.718
- Crystal system : Orthorhombic
- Group : epidote
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