Global Gemology - Rare Gems & Jewels
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HESSONITE

Picture
Hessonite garnet designer ring, by Jane Taylor, in 18K gold
Photo courtesy of Watchlink
Variety:  Hessonite
Species:  Grossularite
Group:  Garnet
Mohs Hardness:  6.5 to 7.5 out of 10
Color:  Medium to dark orange to brownish orange
RI:  1.740 (+0.020 / -0.010)
Birefringence:  None
SR/DR/AGG:  SR
Clarity Type:  Type II
Pleochroism:  None
Spectrum:  Not diagnostic
Fluorescence:  Yellow stones are inert to weak orange under LW and SW
SG:  3.61 (+0.12 / - 0.04)
Routine Treatments:  None

HESSONITE FACTS

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Garnets occur in nearly every color.

Hessonite garnet is nicknamed the "cinnamon stone", and occurs in golden and cinnamon colors.

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Hessonite is known for its characteristic "heat wave" or "scotch in water" effect, when viewed under magnification.
  • 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