HELIODOR

Heliodor and emerald three stone ring

Variety:  Heliodor
Species:  Beryl
​​Mohs Hardness:  7.5 to 8 out of 10
Color:  Slightly greenish yellow to orangy yellow, generally light in tone.
RI:  1.577 to 1.583 (+/- 0.017)
Birefringence:  0.005 to 0.009
SR/DR/AGG:  DR
Clarity Type:  Type I
Optic Character:  Uniaxial negative
Pleochroism:  Weak greenish yellow and yellow, or 2 tones of the stone's bodycolor
Spectrum:  Not diagnostic
Fluorescence:  Inert
SG:  2.72 (+ 0.18 / -0.05)
Routine Treatments:  None
Additional Enhancements:  Heating, irraditation

Helidor Facts

Fantasy cut heliodor in a handmade silver pendant

Heliodor is the yellow variety of beryl.

It ranges from slightly greenish yellow to slightly orangey yellow.

Heliodor is also referred to as "yellow beryl" or "golden beryl".

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