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CAT'S EYE TOURMALINE

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Cat's eye tourmaline and diamond pendant in platinum, accompanied by GIA Tourmaline Report
Cat's eye tourmaline and diamond pendant in platinum
Variety:  Cat's Eye
Species:  Tourmaline
​​Mohs Hardness:  7 to 7.5 out of 10
Color:  Can be any color, but usually dark bluish green to dark greenish blue.
RI:  1.62 to 1.64 Spot Reading
Birefringence:  Usually Not Detectable
SR/DR/AGG:  DR (AGG Reaction Possible)
Clarity Type:  Type III
Optic Character:  Uniaxial negative
Pleochroism:  Medium to strong, usually two tones of the gem's body color.
Spectrum:  Not diagnostic
Fluorescence:  Varies
SG:  3.06 (+0.20 / -0.06)
Routine Treatments:  None

Cat's Eye Tourmaline Facts

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Cat's eye tourmaline set in a handmade sterling silver setting
Cat's eye tourmaline ring

Tourmaline is a very attractive gem that occurs in nearly every color, even phenomenal varieties.

Cat's eye is an optical effect caused by a phenomena known as chatoyancy, caused by many tiny, parallel inclusions.

This cat's eye effect resembles the slit opening in a cat's eye, and will move across the surface of the gem interacts with direct light.

Cat's Eye Tourmaline Gallery

Picture

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