hematine
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals
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Species: Hematine
Mohs Hardness: 5.5 to 6.5 out of 10 Color: Opaque dark gray to black with metallic polish luster. May show reddish color at fracture surfaces. RI: OTL Birefringence: 0.280 (usually not detectable) SR/DR/AGG: Too opaque to test Spectrum: Not diagnostic Fluorescence: Inert SG: 5.20 (+0.08/-0.25) |
