Mineralpedia Details for Zoisite
Named after Sigmund Zois, Baron von Edelstein, a mineral enthusiast who determined Zoisite was a new mineral and contributed the first specimens. A widespread mineral, Zoisite is found in schists of medium grade that were regionally metamorphosed from rocks with high calcium contents. It is also found in eclogites and blueschist facies. Part of the Epidote Group, Zoisite is the only orthorhombic member.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/zoisite.pdf
- Crystal System
- Crystal Habit
- Prismatic, Striated, Columnar
- Perfect, None, None
- Vitreous - Pearly
- gray, apple green, brown, blue, rose red
- Orthorhombic - Dipyramidal
- View Zoisite
- View Zoisite
Zoisite var. Tanzanite from Merelani Hills, Umba Valley, Lelatema Mts., Arusha, Tanzania
A large, beautiful 88.7 carat, gemmy, naturally purple crystal. This specimen has not been heat treated. Some of these crystals are naturally baked by the sun through the geologic ages. This crystal in particular shows excellent color near the top and grades into a yellow-green at the base. The crystal is terminated and shows thin to thick platy forms like so many show and is vertically striated. Overall 3.5 x 2 x 1.3cm.
15 carat natural crystal, untreated, multiple faces on the termination. Overall 18x14x8mm.
Zoisite from Mary mine, Ducktown dist., Polk Co., Tennessee, United States
Dirty white tabular crystals of Zoisite in matrix with Chalcopyrite.
Zoisite from Mundarara mine, Longido, Mt. Kilimanjaro, Tanzania
Deep emerald grain, crystalline-granular Zoisite matrix with red ruby corundum veinlets and pods.
Zoisite var. thulite from Remigny, Témiscamingue Co., Québec, Canada
Apperantly this is a nice roadcoat. The Zoisite is the pink variety called thulite, which occur as elongated crystal slivers with white Armenite.
Zoisite from Leksvik Thulite Quarry, Leksvik, Indre Fosen, Trøndelag, Norway
Granular pink Thulite. Acquired by Hampson in 1945.