JASPER
Variety: Jasper
Species: Chalcedony Mohs Hardness: 7.0 out of 10 Color: Jasper is a general term for opaque chalcedony of any color, or combination of colors, except black or specially-named material RI: 1.535 to 1.539 (1.53 to 1.54 spot reading) Birefringence: Not detectable SR/DR/AGG: AGG Spectrum: Not diagnostic Fluorescence: Generally inert SG: 2.60 (+0.10/-0.05) |