Color Change Sapphire

GIA 7.56 ct. natural color change sapphire and diamond ring
GIA 7.56 ct. natural color change sapphire and diamond ring
Variety:  Color Change Sapphire
​Species:  Corundum
​​Mohs Hardness:  9 out of 10
Color:  Incandescent Lighting - Pinkish brown, brownish pink and purple.  Fluorescent Lighting - Yellowish brown, grayish blue or grayish violet.
RI:  1.762 to 1.770 (+0.009 / -0.005)
Birefringence:  0.008 to 0.010
SR/DR/AGG:  DR
Clarity Type:  Type II
Optic Character:  Uniaxial negative
Pleochroism:  Varies
Fluorescence:  Generally inert
SG:  4.00 (+0.10 / -0.05)
Routine Treatments:  Heating
Additional Enhancements:  N/A

Color Change sapphire facts

GIA 7.56 ct. natural color change sapphire and diamond ring
GIA 7.56 ct. natural color change sapphire and diamond ring

Color change sapphires are a phenomenal variety of corundum that change color depending on the lighting conditions.


Color Change Sapphire Gallery

All photos courtesy of Scott Papper, GIA GG, AJP, CMA (NAJA), Global Gemology & Appraisals