Lapis Lazuli has been treasured since ancient times, used by Egyptians for jewelry and amulets, and ground into ultramarine pigment for Renaissance art.
Country of Origin
Afghanistan, Chile, Russia, USA
Color(s)
Deep blue with golden pyrite inclusions
Chemical Formula
(Na,Ca)₈(AlSiO₄)₆(S,Cl,SO₄,OH)₂
Hardness
5
Luster
Dull (Earthy)
Crystal System
Refractive Index
1.5
Specific Gravity
2.7
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.
