Ruby Kyanite Tumbled Crystal

This tumbled stone is listed as Ruby Kyanite Tumbled Crystal (shop SKU HSRKT), and is sold at Namaste Bookshop near Union Square.

Kyanite is an aluminum silicate that typically forms bladed crystals, often in blue. It has two hardnesses depending on direction and should be set and worn with care.

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: HSRKT

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