History and Origin

Iolite, known as the Viking’s compass, was used for navigation on the seas. Its deep blue to violet hues make it a gem of adventure and mystique.

India, Sri Lanka, Myanmar, Madagascar

Mostly comes from

Currently priced at

$20 - $200+

a Carat

Chemical Formula

Mg₂Al₄Si₅O₁₈

Hardness

0.5

on Mohs scale

Luster

Vitreous (Glassy)

Crystal System

Orthorhombic

Refractive Index

0.02

Specific Gravity

0.08

Color(s)

Blue, Violet, Gray

Chemical Formula

Mg₂Al₄Si₅O₁₈

Hardness

0.5

Luster

Vitreous (Glassy)

Crystal System

Orthorhombic

Refractive Index

0.02

Specific Gravity

0.08

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.

Iolite

History and Origin

Color(s)

Help Guide

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