Charoite and Topaz Physical Properties

Charoite

Topaz

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.54-2.783.49-3.57

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Good in three directions

[001] Perfect

1.7 Mohs Hardness

5-68

2 10

1.8 Chemical Composition

K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Al₂SiO₄(F,OH)₂

Charoite and Topaz Chemical Formula

While comparing Charoite and Topaz 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 Charoite and Topaz chemical formula.

Chemical formula of Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Charoite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Charoite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Charoite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Charoite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.