Thaumasite


Composition: Ca3Si(OH)6(SO4)(CO3).12H2O
Crystal System : Hexagonal
Colours: Colourless, white
Lustre : Vitreous
Hardness (H) : 3.5
Specific Gravity (S.G) : 1.88
References:

Bartelke (1976)

Distribution

Very rare.

Occurrence

  • Supergene

Paragenetic and General Notes

Forms water-clear crystals in radiating groups with siderite on germanite-renierite ore (Pinch and Wilson, 1977).