mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Zoisite

Reset

Zoisite

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

Formula
Ca2Al3(Si2O7)(SiO4)O(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Striated, Columnar 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
gray, apple green, brown, blue, rose red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Even 
Hardness
6.5 
WebMineral
View Zoisite 
Mindat
View Zoisite 

Zoisite var. Tanzanite from Merelani Hills, Umba Valley, Lelatema Mts., Arusha, Tanzania

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.

Click thumbnail images for larger view.

Zoisite from Mary mine, Ducktown dist., Polk Co., Tennessee, United States

Zoisite
            from Mary mine, Ducktown dist., Polk Co., Tennessee, United States

Dirty white tabular crystals of Zoisite in matrix with Chalcopyrite.

Click thumbnail images for larger view.

Zoisite from Mundarara mine, Longido, Mt. Kilimanjaro, Tanzania

Zoisite
            from Mundarara mine, Longido, Mt. Kilimanjaro, Tanzania

Deep emerald grain, crystalline-granular Zoisite matrix with red ruby corundum veinlets and pods.

Click thumbnail images for larger view.

Zoisite var. thulite from Remigny, Témiscamingue Co., Québec, Canada

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.

Click thumbnail images for larger view.

Zoisite from Leksvik Thulite Quarry, Leksvik, Indre Fosen, Trøndelag, Norway

Zoisite
            from Leksvik Thulite Quarry, Leksvik, Indre Fosen, Trøndelag, Norway

Granular pink Thulite. Acquired by Hampson in 1945.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2022 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map