Global Gemology - Rare Gems & Jewels
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smoky quartz


Smoky quartz choker necklace by designer, John Hardy
Smoky quartz choker necklace, by John Hardy
Variety:  Smoky
Species:  Quartz
​​Mohs Hardness:  7 out of 10
Color:  Predominantly brown
RI:  1.544 to 1.553 (very constant)
Birefringence:  0.009
SR/DR/AGG:  DR to AGG (if highly fractured and semi-translucent
Clarity Type:  Type I
Optic Character:  Uniaxial positive.  Might show a bull's eye or Airy's spiral optic figure and Brazil law twinning under crossed polarizing filters.
Pleochroism:  Very weak.  Different tones of body color
Spectrum:  Not diagnostic
Fluorescence:  Generally inert
SG:  2.66 (+0.03 / -0.02)
Routine Treatments:  None
Additional Enhancements:  Irradiation

smoky quartz facts

Fan-shaped fantasy cut smoky quartz set in a 14K gold textured setting
Fantasy cut smoky quartz ring in a textured yellow gold setting

​
​​Smoky quartz is the brown variety of quartz.​


Smoky Quartz Gallery

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