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Malachite : Cu2(CO3)(OH)2, Azurite : Cu3(CO3)2(OH)2

Copyright © Rob Lavinsky & irocks.com
 
 
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Malachite : Cu2(CO3)(OH)2, Azurite : Cu3(CO3)2(OH)2

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10.2 cm x 8 cm x 5 cm

10.2 x 8.0 x 5.0 cm. A superb Brazilian malachite sspecimen. This specimen is highlighted by spheroidal rosettes, to 1.5 cm across, of azurite that have been totally replaced by rich green, malachite. In addition, there are smaller botryoids of "primary" light green malachite, to .3 cm across, that abound all over the specimen as a secondary growth upon the malachite that has replaced the azurite. I remember when these came out in the late 1980s, and none of us had seen but micros for azurite from Brazil and all of a sudden there was a table full of it. And, in rosettes no less, the best of them with partial alteration to malachite and thus a lovely color contrast. Some small number has trickled out recently, but nothing like the quality of pieces like this, from going on over 15 years ago now. Ex. Dr. Edward David Collection.


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Photo added: 17th Sep 2009