Orthoclase and Topaz Physical Properties

Orthoclase

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

2.54-2.613.49-3.57

1 7.18

1.5 Fracture

Gems, Uneven

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

1.6 Cleavage

Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.

[001] Perfect

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Al₂SiO₄(F,OH)₂

Orthoclase and Topaz Chemical Formula

While comparing Orthoclase 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 Orthoclase and Topaz chemical formula.

Chemical formula of Orthoclase- KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

Compare Colorless Gems

Orthoclase Vs Phenakite

Orthoclase Vs Phosphophyllite

Orthoclase Vs Phosphosiderite

Orthoclase and Topaz Specific Gravity

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