Star Ruby and Achroite Physical Properties

Star Ruby

Achroite

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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

3.95-4.102.90-3.40

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Not Available

1.7 Mohs Hardness

Not Available7-7.5

2 10

1.8 Chemical Composition

Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Star Ruby and Achroite Chemical Formula

While comparing Star Ruby and Achroite 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 Star Ruby and Achroite chemical formula.

Chemical formula of Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

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Star Ruby and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Ruby and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Ruby and Achroite Optical Properties during the identification of gemstone. Specific gravity of Star Ruby is 2.90-3.40 whereas that of Achroite is 2.90-3.40.