Visit Us!
633 Old Country Road, Riverhead, NY 11901
Left Arrow
Back to gem encyclopedia
Unusual Gemstones

Turquoise

Sky blue to greenish-blue

Available in

History and Origin

Turquoise has been cherished for millennia, valued by ancient Egyptians and Native Americans for its sky-blue beauty and protective properties. Its rich cultural significance has made it a symbol of luck and prosperity.

Iran, USA, China, Egypt

Mostly comes from

Currently priced at

$5 - $1,000 per carat

a Carat

Chemical Formula

CuAl₆(PO₄)₄(OH)₈·4H₂O

Hardness

6

on Mohs scale

Luster

Waxy

Crystal System

Triclinic

Refractive Index

1.61

Specific Gravity

2.6

Color(s)

Sky blue to greenish-blue
Chemical Formula
CuAl₆(PO₄)₄(OH)₈·4H₂O
Hardness
6
Luster
Waxy
Crystal System
Triclinic
Refractive Index
1.61
Specific Gravity
2.6

Help Guide

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.

View More

Gemstones