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Dominant species
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Thomsonite
Chemical
Formula
NaCa2Al5Si5O20·6H2O
Species
Silicates
Crystal
System
Orthorhombic
Mohs
Scale
5-5.5
Specific
Gravity
2.23-2.29
Color
colorless, white, beige
Streak
white
Luster
vitreous, pearly
Diaphaneity
transparent to translucent
Cleavage
perfect on ; good on
Thomsonite478
Thomsonite478
Thomsonite475
Thomsonite475
Thomsonite471
Thomsonite471
Thomsonite468
Thomsonite468
Thomsonite464
Thomsonite464
Thomsonite460
Thomsonite460
Thomsonite455
Thomsonite455
Thomsonite452
Thomsonite452
Thomsonite448
Thomsonite448
Thomsonite447
Thomsonite447
Thomsonite445
Thomsonite445