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 sapphire is a very rare, phenomenal variety of sapphire that actually changes color in different lighting conditions.

Color change sapphires typically change from blue under fluorescent light to violet under incandescent light, but can also exhibit other colors such as greenish, yellowish, and pinkish.

Color Change Sapphire Gallery


All photos courtesy of Scott Papper, GG, ASA, CMA, RGA, AJP, CMSP, CSSP