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www.mineralgallery.co.za Minerals A-E |
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Cornetite |
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Name
Cornetite
Chemistry
Cu3(PO4)(OH)3
Uses
As a specimen
Color
Dark blue, green-blue to green
Hardness
4.5
Specific gravity
4.1
Streak
Blue
Crystals
Short, rounded, nearly diamond-shaped prisms that are terminated by a dome with trapezohedral faces, also as tiny crystalline druzes, fibrous masses and crusts. orthorhombic; 2/m2/m2/m
Accompanied by:
Malachite, limonite, libethenite, malachite, pseudomalachite, brochantite and other secondary copper ore minerals
Similar to:
Cornetite is a rare secondary copper mineral that is noted for its deep blue, green-blue to green color. It is found in highly weathered, oxidation zones of copper sulfide ore bodies. It has a good deep color, nice crystal forms and an attractive sparkle, all the ingredients for a popular collection mineral.
The luster is vitreous
