Thomsonite and Sellaite Physical Properties

Thomsonite

Sellaite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.25-2.403.14-3.16

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

perfect on {010}; good on {100}

Perfect on {010} and {110}

1.7 Mohs Hardness

5-5.55-5.5

2 10

1.8 Chemical Composition

NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MgF 2Ulrich Henn and Claudio C.

Thomsonite and Sellaite Chemical Formula

While comparing Thomsonite and Sellaite 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 Thomsonite and Sellaite chemical formula.

Chemical formula of Thomsonite- NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Thomsonite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thomsonite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thomsonite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Thomsonite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.