almandine
Photo courtesy of Scott Papper, GIA GG, AJP, Global Gemology & Appraisals
|
Species: Almandine
Group: Garnet Mohs Hardness: 6.5 to 7.5 out of 10 Color: Generally dark toned brownish orange to brownish red to purplish red, with low saturation. RI: 1.714 to 1.888 Birefringence: None SR/DR/AGG: SR, often with ADR Pleochroism: None Spectrum: 3 strong bands in the green and yellow at 505, 527 & 575nm Fluorescence: Inert SG: 2.72 (+0.18 / -0.05) |