rubellite
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals
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Variety: Rubellite
Species: Tourmaline Mohs Hardness: 7 to 7.5 out of 10 Color: Light pink through strongly saturated orangy red, pure red, purplish red to purple RI: 1.624 to 1.644 (+/-0.005) Birefringence: Usually 0.018 to 0.020 SR/DR/AGG: DR Clarity Type: Type III Optic Character: Uniaxial negative Pleochroism: Medium to strong, usually two tones of the gem's body color. Spectrum: Often not diagnostic Fluorescence: Varies. Some pink stones may range from inert to weak red under LW and SW SG: 3.06 (+0.20 / -0.06) |
