21 avril 2012
Coboltoan calcite with malachite. Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre).
Coboltoan calcite with malachite. Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) . p hoto Heritage Auctions It is no surprise that minerals predominantly display colors involving one of the "earth tones" - orange, brown,...