Topaz and Realgar Physical Properties

Topaz

Realgar

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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

3.49-3.573.56

1 7.18

1.5 Fracture

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

(e.g. graphite).

1.6 Cleavage

[001] Perfect

{010} Good

1.7 Mohs Hardness

8Not Available

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Topaz and Realgar Chemical Formula

While comparing Topaz and Realgar 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 Realgar chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Sagittarius

Topaz Vs Quartz Smoky

Topaz Vs Petoskey Stone

Topaz Vs Pietersite

Topaz and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Realgar Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.56 whereas that of Realgar is 3.56.