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

              usaCa.gif (10636 bytes)



Field Test

View past weeks pictures
Rock Index

Links to other websites

Maybe Not Rocks
Other Stuff

Click on Picture
                  to Enlarge

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.

If you have a picture that you would like to see posted or have a comment

You can contact me at

Please do not send a picture before contacting me.

All pictures on this website are to be considered as copyrighted material. You have permission to use them in any non-profit situation as long as you include the photographer's name along with the photo. Any other use requires written permission from

Hi-res copies of the photos are available from

All background photos by Jim Bryan