Natálie
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Iceland spar is a special transparent variety of calcite

Iceland spar is a clear, transparent, colorless crystallized variety of calcite (calcium carbonate, Large pieces are split along natural cleavage planes to form natural rhombs. Iceland spar is probably best known for exhibiting the optical propert

Olivenite. Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany FOV=3 mm Photo Copyright © Dominik Schläfli

Olivenite. Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany FOV=3 mm Photo Copyright © Dominik Schläfli

Apatite with Faden Quartz - Zhob, Baluchistan, Pakistan

apatite with faden quartz Zhob, Baluchistan, Pakistan

BARYTE Frizington, Cumbria, England, Europe

A consummate English classic Blue Baryte from the Iron mining area of Frizington. The specimen displays excellent characteristic tabular chisel form crystals measuring to

Gypsum : CaSO4·2H2O  Red River Floodway, Winnipeg, Manitoba, Canada  Copyright © Quebul Fine Minerals

Gypsum : CaSO4·2H2O Red River Floodway, Winnipeg, Manitoba, Canada Copyright © Quebul Fine Minerals

Azurite and Malachite from Brisbee, AZ

Loud Stone azurite and malachite -- photo by R. Weller - Cochise College (very mindful of fractal patterns)

Polished Malachite Nodule Cluster. Mined in the 1970's from Katanga, Congo.

Mined in the from Katanga, Congo.

Uvite Tourmaline with Magnesite from Brumado District, Serra das eguas, Bahia…

Uvite Tourmaline with Magnesite from Brumado District, Serra das eguas, Bahia, Brazil in Online Mineral Museum

Minerals and Crystals — Fluorite on Dolomite -  Yaogangxian Mine, Yizhang...

Minerals and Crystals — Fluorite on Dolomite - Yaogangxian Mine, Yizhang.

Fluorite & Siderite - Boltsburn West Mine, Rookhope, Weardale, Co. Durham, England, UK Size: 4.0 x 3.2 x 2.5 cm

Fluorite and Siderite - Boltsburn West Mine, Rookhope, Weardale, Co. Durham, England Size: x x cm