HESSONITE

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

Garnets occur in nearly every color.

Hessonite garnet is nicknamed the "cinnamon stone", and occurs in golden and cinnamon colors.
​
Hessonite is known for its characteristic "heat wave" or "scotch in water" effect, when viewed under magnification.