Turquoise has been a highly popular semi-precious gem to many societies from the Egyptians to the Aztecs since ancient times. Turquoise is a very porous material, so heat, light, oils, and chemicals can have a negative effect on the stones color and luster. Turquoise is most popular in southwestern fashions. Use turquoise beads with sterling silver beads and charms, Southwestern Inlay beads and pendants, and heishi shells. This turquoise has been stabilized to harden the stone and protect its color.