04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco
04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco 04990 -  Well Crystallized Acicular Brochantite with Quartz from South Morocco

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04990 - Well Crystallized Acicular Brochantite with Quartz from South Morocco

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Species
Brochantite with Quartz
Age
-
Location
Guelmim, Occidental Sahara, South Morocco
Formation
Bouizakarne mines
Size
84.3 mm   •    in
Weight
374 g   •    oz
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Description

Brochantite is a sulfate mineral, one of a number of cupric sulfates. Its chemical formula is Cu4SO4(OH)6. Formed in arid climates or in rapidly oxidizing copper sulfide deposits.

Crystals of brochantite can range from emerald green to black-green to blue-green, and can be acicular or prismatic. Brochantite is often associated with minerals such as malachite, azurite, and chrysocolla, and may form pseudomorphs with these minerals.

Brochantite is a common corrosion product on bronze sculptures located in urban areas, where atmospheric sulfur dioxide (a common pollutant) is present. Brochantitie forms mainly in exposed areas where weathering prevents accumulation copper ions and enhancement in the acidity of water films. In sheltered areas, the main corrosion product is antlerite.

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