Rock Picture of the Week

This site is dedicated to the promotion and enjoyment of rockhounding which includes rock, mineral, and fossil hunting, collecting, and their related activities. Each week I will post a new subject related picture and description.
I will not be routinely updating this website.

I will continue to keep it available for your use.

Please feel free to browse previously posted specimens

in my archives.

This picture is Malachite

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Photo by Jim Bryan

Malachite (Ca2CO3(OH)2) is an ore of copper and often used as an ornament. Despite it's beauty, its usfulness in jewelry is limited due to its softness. It is often found on the fringe areas of volcanic activity or mountain upthrust where hot, metal rich gasses seep up through cracks and seams in the Earth.
It forms a layer averaging about 1/8 inch on this specimen.

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All background photos by Jim Bryan