Archive for the Almandite Category
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Star Almandite
Refractive Index : 1.790 (+0.030 – 0.030)
Optical Characteristic : SR, ADR
Specific Gravity : 4.05 (+0.25 – 0.12)
Formula : Fe++3AI2(SiO4)3
Crystal System : Cubic
Variety/Species : Almandite
Species/Group : Garnet group
Birefringence : none
Dispersion : 0.024
Hardness : 7 to 7.5
Toughness : Fair to good
Ultrasonic : Usually safe
Steam : Never
UV Long : Inert
UV Short : Inert
Pleochroism : None
Strength : N/A
Pleochroism [...]