Achroite and Ruby Physical Properties

Achroite

Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.403.97-4.05

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

Not Available

No true cleavage

1.7 Mohs Hardness

7-7.59

2 10

1.8 Chemical Composition

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.

Al ₂ O ₃

Achroite and Ruby Chemical Formula

While comparing Achroite and Ruby 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 Achroite and Ruby chemical formula.

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.
Chemical formula of Ruby- Al ₂ O ₃

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Achroite and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.