Turquoise and Sillimanite Physical Properties

Turquoise

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.903.20-3.26

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Splintery

1.6 Cleavage

Good to perfect_usually N/A

{010} perfect

1.7 Mohs Hardness

5-66-7.5

2 10

1.8 Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Turquoise and Sillimanite Chemical Formula

While comparing Turquoise and Sillimanite 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 Turquoise and Sillimanite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Semi Precious Gemstones

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Turquoise and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.