Global Gemology - Rare Gems & Jewels
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LAPIS LAZULI

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Lapis Lazuli
Lapis lazuli stud earrings
Species:  Lapis Lazuli
​​Mohs Hardness:  5 to 5.5 out of 10
Color:  Semi-translucent to opaque.  Medium to dark slightly greenish blue to violetish blue.  Could be mottled with different tones of blue with white calcite patches.  May have metallic gold pyrite flecks.
RI:  Vague readings around 1.500 and sometimes 1.670 due to calcite
Birefringence:  None
SR/DR/AGG:  AGG
Fluorescence:  Weak to moderate green or yellowish green under SW.  Calcite inclusions might fluoresce pink under LW.
SG:  2.75 (+/-0.25)
Routine Treatments:  None
Additional Enhancements:  Dyeing

Lapis Lazuli Facts

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Golden pyrite and calcite inclusions in lapis lazuli
Pyrite inclusions in lapis lazuli

Lapis lazuli is an opaque gem known for its intense blue color with flecks of golden pyrite inclusions.

Lapis lazuli is composed of mostly lazurite, but is often mottled with calcite (white), sodalite (blue), and pyrite (gold).

Egyptians would grind lapis to use for cosmetic purposes, such as eyeliner.

Lapis Lazuli Gallery

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All photos courtesy of Scott Papper, GIA GG, AJP, CMA (NAJA)

  • HOME
  • ABOUT
  • SHOP
  • SERVICES
    • APPRAISALS
    • EXPERT WITNESS TESTIMONY
    • SELL YOUR JEWELRY
  • GEMOLOGY
    • GEM ENCYCLOPEDIA
    • THE ART OF GEMOLOGY
  • JEWELRY EDUCATION
    • DIAMOND FACTS
    • JEWELER DIRECTORY
    • JEWELRY PERIODS
    • POCKET WATCHES
    • NATIVE AMERICAN JEWELRY
  • GLOSSARY