Thaumasite and Andalusite Physical Properties

Thaumasite

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.913.05-3.21

1 7.18

1.5 Fracture

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

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Indistinct

Good on {110}, poor on {100}

1.7 Mohs Hardness

3.57.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Thaumasite and Andalusite Chemical Formula

While comparing Thaumasite and Andalusite 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 Thaumasite and Andalusite chemical formula.

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

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Thaumasite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thaumasite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thaumasite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Thaumasite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.