Turquoise Mountain

Cochise County, Arizona

High-grade Arizona turquoise with hard, vivid color and dense webbing.

Where it comes from

Turquoise Mountain, sometimes called Number Eight Mountain or Persian Blue Mountain, sits in Cochise County, Arizona. The mine produces gem-grade material in small quantities, which keeps Turquoise Mountain stones in collector pieces and high-end commissions rather than mass-market jewelry.

What makes it distinctive

Deep saturated blue to blue-green color with tight, dramatic spiderweb matrix. The hardness rivals the toughest American turquoise, which makes it well-suited to rings and cuffs that get daily wear. The stones polish to a glassy finish that holds up across decades.

How to identify it

Look for the combination of deep color and tight spiderweb matrix. Turquoise Mountain is one of the more identifiable high-grade American mines visually. Provenance and seller reputation matter at this tier. The hardness should be obvious in the hand: the stone feels substantial and dense.