2.9" Polished Cobaltoan Calcite Slab - Congo
This is a hand-polished slab of pink cobaltoan calcite from the Congo. The lapidary work is nice, and allows for the vivid coloration of the cobaltocalcite to be easily seen. There is also a metallic luster that shines in the light when the specimen is rotated, some of this is attributed to native copper inclusions. A few spots of chrysocolla (copper oxidation) can be observed throughout the face of this specimen. Comes with an acrylic display stand.
Cobaltoan calcite, also known as cobaltocalcite, is one of many different varieties of calcite, forming with a chemical composition of (Ca,Co)CO3. It crystallizes in a trigonal crystal system and forms rhombohedral or scalenohedral crystals. These crystals tend to display a pink color of which intensity can range anywhere from a pinkish-salmon to a hot pink.