Agrellite and Topaz Physical Properties

Agrellite

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

2.883.49-3.57

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

perfect [110]

[001] Perfect

1.7 Mohs Hardness

5.58

2 10

1.8 Chemical Composition

NaCa2Si4O10F

Al₂SiO₄(F,OH)₂

Agrellite and Topaz Chemical Formula

While comparing Agrellite 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 Agrellite and Topaz chemical formula.

Chemical formula of Agrellite- NaCa2Si4O10F
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Agrellite and Topaz Specific Gravity

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