Amazonite

Hardness of 6 on the Mohs scale, vibrant turquoise-green color, vitreous to pearly luster, and monoclinic crystal system with good cleavage.

Forms primarily in pegmatites and granitic rocks through slow cooling of magma rich in potassium and water, often containing trace lead.

Used primarily as a gemstone for cabochons, beads, and ornamental carvings, as well as valued by mineral collectors.

Despite its name, no amazonite deposits are found in the Amazon River basin; the green color was historically attributed to copper, but is now known to be caused by lead and water.

Identified by its distinct bright blue-green color and grid-like twinning patterns; commonly sourced from Russia, Colorado, Madagascar, and Brazil.