Topaz and Jacobsite Physical Properties

Topaz

Jacobsite

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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

3.49-3.574.76-5.03

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

[001] Perfect

None

1.7 Mohs Hardness

85.5-6.5

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Topaz and Jacobsite Chemical Formula

While comparing Topaz and Jacobsite 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 Topaz and Jacobsite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

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Topaz and Jacobsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Jacobsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Jacobsite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 4.76-5.03 whereas that of Jacobsite is 4.76-5.03.