Quartz Pyrite Fluorite

This mineral specimen is listed as Quartz Pyrite Fluorite (shop SKU WJQPFL798), and is sold at Namaste Bookshop near Union Square.

Fluorite is calcium fluoride and forms in cubes or octahedra, often in purple, green, or banded rainbow colors. It is relatively soft, so it is best handled gently. In crystal traditions, fluorite is associated with focus and clarity. Those ideas belong to folklore and personal practice, not to any medical claim.

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.

• SKU: WJQPFL798

You can see this one in person at Namaste Bookshop, 2 West 14th Street near Union Square in New York City, or order it online.