Alabaster and Topaz Physical Properties

Alabaster

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

2.303.49-3.57

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

[001] Perfect

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)

Al₂SiO₄(F,OH)₂

Alabaster and Topaz Chemical Formula

While comparing Alabaster 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 Alabaster and Topaz chemical formula.

Chemical formula of Alabaster- CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

Compare Brown Gemstones

Alabaster Vs Anthophyllite

Alabaster Vs Anhydrite

Alabaster Vs Astrophyllite

Alabaster and Topaz Specific Gravity

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