Sillimanite and Thaumasite Physical Properties

Sillimanite

Thaumasite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.261.91

1 7.18

1.5 Fracture

Splintery

Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

{010} perfect

Indistinct

1.7 Mohs Hardness

6-7.53.5

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Ca 6Si 2(CO 3) 2(SO 4) 2(OH) 12 · 24H 2OUlrich Henn and Claudio C.

Sillimanite and Thaumasite Chemical Formula

While comparing Sillimanite and Thaumasite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Sillimanite and Thaumasite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Thaumasite- Ca 6Si 2(CO 3) 2(SO 4) 2(OH) 12 · 24H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

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Sillimanite Vs Starlite

Sillimanite and Thaumasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Thaumasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Thaumasite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 1.91 whereas that of Thaumasite is 1.91.