Unusual Gemstones

Turquoise

Current Market Range

$5 - $1,000 per carat

Turquoise has a history spanning over 5,000 years. It was revered by Egyptians and Native Americans as a sacred stone for protection and healing.

Iran, USA, China, Egypt

Sky blue to greenish-blue

Chemical Formula

CuAl₆(PO₄)₄(OH)₈·4H₂O

Hardness

Luster

Waxy

Crystal System

Triclinic

Refractive Index

1.61

Specific Gravity

2.6

Crystal System

Gemstones and minerals are classified into seven primary crystal systems based on their atomic structure.

Refractive Index

The refractive index (RI) of a material measure how much light is bent, or refracted, when entering the material from another medium.

Specific Gravity

The specific gravity (SG) of a substance is a measure of its density compared to water.

Chemical Formula

A chemical formula shows the types and quantities of atoms in a molecule.