Collection: Phenakite from Mount Antero in Colorado

America's Rarest Gem — Straight from the Summit

Mount Antero, rising over 14,000 feet in the Colorado Rockies, is the premier source of phenakite in North America. The specimens in this collection represent some of the rarest and largest examples available on the market today — recovered from one of the most demanding and celebrated gem localities in the world.

About Phenakite

Phenakite is a rare beryllium silicate prized for its exceptional hardness (7.5–8 Mohs), brilliant adamantine luster, and gem-grade clarity. Mount Antero crystals are renowned for their sharp rhombohedral form and pristine terminations — coveted by collectors and gem cutters alike.

Why Mount Antero?

• The only significant phenakite locality in North America
• Crystals form in high-altitude pegmatite pockets alongside aquamarine and topaz
• Limited annual access due to altitude, weather, and protected wilderness
• Locality-verified specimens with documented provenance

Mount Antero phenakite is not a mineral you find at every show. These are among the finest and largest specimens in circulation — from one of the most storied collecting sites in the American West.