History and Origin

Tourmaline, prized for its vibrant rainbow of colors, was first discovered in Sri Lanka. Its versatility and modern appeal make it a favorite for unique, colorful jewelry designs.

Brazil, Afghanistan, Madagascar, USA

Mostly comes from

Currently priced at

$20 - $10,000+ per carat

a Carat

Chemical Formula

(Na,Ca)(Al,Fe,Li,Mg,Mn)₃Al₆(BO₃)₃Si₆O₁₈(OH,F)₄

Hardness

7.5

on Mohs scale

Luster

Vitreous (Glassy)

Crystal System

Trigonal (Rhombohedral)

Refractive Index

1.61

Specific Gravity

Color(s)

Bi-color, multi-color, green, pink, blue, and black

Chemical Formula

(Na,Ca)(Al,Fe,Li,Mg,Mn)₃Al₆(BO₃)₃Si₆O₁₈(OH,F)₄

Hardness

7.5

Luster

Vitreous (Glassy)

Crystal System

Trigonal (Rhombohedral)

Refractive Index

1.61

Specific Gravity

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.

Tourmaline

History and Origin

Color(s)

Help Guide

View More

Gemstones

Diamond

Sapphire

Ruby

Emerald