Probably one of the most recognized semiprecious gemstones in existence, turquoise has been popular since prehistoric times. This stone is a hydrated aluminum copper phosphate that often contains iron. It occurs naturally in shades ranging from sky blue to grey-green, usually in locations where copper is hidden in the soil in high concentrations. The blue color is caused by copper, while the green color is caused by iron or chromium. It has a hardness of 6. Turquoise is often fracture sealed. This doesen’t mean that it has fractures, it means that it was sealed with an acrylic resin to enhance it’s color, texture, and hardness. Turquoise is somewhat soft so avoid scratches and sharp blows. To be certain and coatings are not removed also avoid hot water and household chemicals.

 Its name comes from French pierre turquoise, meaning “Turkish stone,” a reference to where Persian material passed on its way to Europe.  Turquoise is found in Australia, Chile, Iran, Mexico, Tibet, USA (Arizona , California and New Mexico).

Turquoise is the anniversary gemstone for the 5th year of marriage.

High-grade natural turquoise often is sourced from the Sleeping Beauty mine in Arizona, and it becomes processed into beads in India, China or Vietnam.  Turquoise will absorb body oils and, over time, become green.

African Turquoise

This stone is not true turquoise, but actually a natural jasper found in Africa. It has a matrix structure similar to that of turquoise, and is a light bluish-green. The matrix is usually dark or black. It is an interesting substitute for a true turquoise.