Lazurite

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Lazurite is a richly colored blue mineral primarily seen in cabochon gems or carvings. Lazurite is a major component of lapis lazuli, giving the stone its brilliant blue color. Lazurite crystals are rare, as the gem is most commonly found in massive form and rarely as well-formed crystals.

Lazurite Polished
Lazurite Classification
Common Name Lazurite
Species Lazurite
Lazurite Optical Properties
Transparency Translucent - Opaque
Refractive Index 1.502-1.522
Polariscope Reaction Aggregate (AGG), Singly Refractive (SR)
Pleochroism None
Lazurite Characteristic Physical Properties
Hardness 5.5
Streak Bright Blue Sometimes White
Specific Gravity 2.300-2.400
Toughness Poor
Inclusions Lazurite commonly has white calcite and brassy pyrite inclusions.
Luster Vitreous, Dull
Stability Poor
Fracture Uneven
Cleavage Poor
Lazurite Chemistry & Crystallography
Chemical Formula Na6Ca2(Al6Si6O24)(SO4,S3,S2,ClOH)2
Crystal System Cubic
Chemistry Classification Silicate

Lazurite Colors

  • Blue Lazurite Blue

Countries of Origin

Afghanistan

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Tim Matthews

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Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.