GLOBAL GEMOLOGY - RARE GEMS & JEWELS
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tourmalinated quartz


Tourmalinated quartz and sterling silver pendant
Photo courtesy of Scott Papper, GIA GG, AJP, CMA (NAJA), Global Gemology & Appraisals
Variety:  Tourmalinated
Species:  Quartz
​​Mohs Hardness:  7 out of 10
Color:  Clear with long, slender, black tourmaline inclusions
RI:  1.544 to 1.553 (very constant)
Birefringence:  0.009
SR/DR/AGG:  DR
Optic Character:  Uniaxial positive.
Pleochroism:  None
Spectrum:  Not diagnostic
Fluorescence:  Inert
SG:  2.64 to 2.69 (Usually 2.66)

tourmalinated quartz facts

Emerald cut tourmalinated quartz
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals


​​Tourmalinated quartz is clear rock crystal included with chaotically-intersecting black tourmaline rods.

These gems are often appreciated by collectors for their unique appearance.



Tourmalinated quartz photomicrograph
Photo courtesy of Scott Papper, GIA GG, AJP, CMA (NAJA), Global Gemology & Appraisals

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  • HOME
  • ABOUT US
  • SHOP
  • GEMOLOGY
    • GEM ENCYCLOPEDIA
    • DECORATIVE PRINTS
    • THE ART OF GEMOLOGY
  • APPRAISALS
    • INSURANCE
    • DIVORCE
    • ESTATE TAX
    • ESTATE DISTRIBUTION
    • CHARITABLE DONATION
    • LIQUIDATION
    • APPRAISALS THRU EMAIL
  • SELL YOUR JEWELRY
  • JEWELRY EDUCATION
    • DIAMOND FACTS
    • JEWELER DIRECTORY
    • JEWELRY PERIODS
    • POCKET WATCHES
    • NATIVE AMERICAN JEWELRY
  • GLOSSARY