Tourmaline in Quartz Tumbled Crystal

Among the books, decks, and stones on 14th Street is this tumbled stone: Tourmaline in Quartz Tumbled Crystal (shop SKU HSTQT).

Tourmaline is a group of complex silicate minerals that occur in many colors, including pink and black. In crystal traditions, tourmaline is associated with protection and with balancing energy. Those ideas belong to folklore and personal practice, not to any medical claim.

Tumbled stones are polished in a drum, which softens sharp edges and brings out color. 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.

• SKU: HSTQT

See it at Namaste Bookshop, 2 West 14th Street near Union Square in New York City, or order online.