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zoisite
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{{about|the mineral named zoisite|the Sailor Moon character|Shitennou (Sailor Moon)#Zoisite{{!}}Shitennou}}







factoids
Zoisite, first known as saualpite, after its type locality, is a calcium aluminium hydroxy sorosilicate belonging to the epidote group of minerals. Its chemical formula is Ca2Al3(SiO4)(Si2O7)O(OH).Zoisite occurs as prismatic, orthorhombic (2/m 2/m 2/m) crystals or in massive form, being found in metamorphic and pegmatitic rock. Zoisite may be blue to violet, green, brown, pink, yellow, gray, or colorless. Blue crystals are known under the name Tanzanite. It has a vitreous luster and a conchoidal to uneven fracture. When euhedral, zoisite crystals are striated parallel to the principal axis (c-axis). Also parallel to the principal axis is one direction of perfect cleavage. The mineral is between 6 and 7 on the Mohs hardness scale, and its specific gravity ranges from 3.10 to 3.38, depending on the variety. It streaks white and is said to be brittle. Clinozoisite is a more common monoclinic polymorph of Ca2Al3(SiO4)(Si2O7)O(OH). Transparent material is fashioned into gemstones while translucent-to-opaque material is usually carved.The mineral was described by Abraham Gottlob Werner in 1805. He named it after the Carniolan naturalist Sigmund Zois, who sent him its specimens from Saualpe in Carinthia.BOOK,weblink Austin, Flint-Rogers, Introduction to the Study of Minerals, McGraw-Hill Book Company, 1937, 478, Zois realized that this was an unknown mineral when it was brought to him by a mineral dealer, presumed to be Simon Prešern, in 1797.JOURNAL,weblink Neue Daten über die Entdeckung des Zoisits, German, Slovenian, New Data About the Discovery of Zoisite, Geologija: razprave in poročila, Ernest, Faninger, 1988–1989, Državna založba Slovenije [State Publishing House of Slovenia], 31, 32, 609–615, 0016-7789, Sources of zoisite include Tanzania (tanzanite), Kenya (anyolite), Norway (thulite), Switzerland, Austria, India, Pakistan, and the U.S. state of Washington.

See also

Notes

{{Reflist}}

References

  • Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., {{ISBN|0-471-80580-7}}
  • JOURNAL, Faye, G H, Nickel, E H, 1971, On the pleochroism of vanadium-bearing zoisite from Tanzania, The Canadian Mineralogist, 10, 812–821, Ernest Henry Nickel,weblink

External links

{{commons category|Zoisite}}
  • EB1911, Zoisite, Zoisite, 28, 1000-1001,


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