Cobalto Calcite Specimens Congo

Cobalto Calcite Specimens Congo (shop SKU CECC) is offered as a mineral specimen online and at the bookshop on West 14th Street.

Calcite is calcium carbonate, a soft mineral that can form in many colors and crystal habits, including columnar 'vortex' shapes. Because it is soft, it is best kept dry and handled gently.

Natural stones vary in color, clarity, and shape, so the piece you receive will have its own character even when the weight, grade, or size is listed. The title gives the origin as Congo.

• SKU: CECC

Look for it at Namaste Bookshop, 2 West 14th Street near Union Square, or order from the shop online.