Archive for the Sodalite Group Category

Tugtupite

Refractive Index : 1.502-1.496

Optical Characteristic : DR, AGG

Specific Gravity : 2.36 +.22 -.06

Formula : Na4AIBeSi4O12CI

Crystal System : Tetragonal

Variety/Species : Tugtupite

Species/Group : Sodalite group

Birefringence : Not detectable

Dispersion : none

Hardness : 4 to 6.5

Toughness : good

Ultrasonic : risky

Steam : Risky

UV Long : Moderate to strong

UV Short : Modarate to strong

Pleochroism : None

Strength : N/A

Pleochroism Colors : None

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