Aqua Aura Quartz Natural Point Cap Set Sterling Silver Pendant

Aqua Aura Quartz Natural Point Cap Set Sterling Silver Pendant (shop SKU SBAAQUP69) is offered as a pendant online and at the bookshop on West 14th Street.

Aqua aura is natural quartz bonded with gold in a vapor-treatment process, which gives a bright blue, iridescent surface. It is treated quartz, not a naturally blue crystal. Sterling silver is 92.5% silver, often stamped .925; like all silver, it can tarnish over time and can be brightened with a soft polishing cloth.

Because the material is natural, its color and pattern vary from piece to piece. The title describes a cap setting that holds the piece at one end. Store jewelry dry and away from lotions, perfume, and harsh cleaners to keep it looking its best.

• SKU: SBAAQUP69

Find it at Namaste Bookshop, 2 West 14th Street, a short walk from Union Square in Manhattan, or order it online.