Vortex Columnar Calcite

Among the books, decks, and stones on 14th Street is this mineral specimen: Vortex Columnar Calcite (shop SKU WJVC500).

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 or grade is listed.

Namaste Bookshop is on the south side of 14th Street, just west of Fifth Avenue, about a short walk from Union Square.

• SKU: WJVC500

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