Amethyst Cactus Pine Cluster Brazil

Among the books, decks, and stones on 14th Street is this crystal cluster: Amethyst Cactus Pine Cluster Brazil (shop SKU DPAM3).

Spirit, cactus, or pineapple quartz is a quartz point or cluster covered in a coat of smaller crystal points, giving a bristled or sparkling surface. Citrine spirit quartz may be natural or heated. In crystal traditions, spirit quartz is associated with community and with a lifted mood. Those ideas belong to folklore and personal practice, not to any medical claim.

A cluster is a group of crystals that grew together; no two have the same arrangement of points. 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: DPAM3

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