Topaz and Chalcedony Physical Properties

Topaz

Chalcedony

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.57

2.55-2.70

1.5 Fracture

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

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann

1.6 Cleavage

[001] Perfect

Absent

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

SiO₂

Topaz and Chalcedony Chemical Formula

While comparing Topaz and Chalcedony 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 Chalcedony chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Chalcedony- SiO₂

Compare Gems for Sagittarius

Topaz Vs Petoskey Stone

Topaz Vs Pietersite

Topaz Vs Quartz Smoky

Topaz and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.