Eilat stone and Achroite Physical Properties
Tenacity
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Not Available
  
Solubility
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Not Available
  
Durability
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Specific Gravity
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2.90-3.40
  
Fracture
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Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
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Mohs Hardness
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7-7.5
  
Chemical Composition
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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.
  
Eilat stone and Achroite Chemical Formula
While comparing Eilat stone 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 Eilat stone and Achroite 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.
Eilat stone and Achroite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Eilat stone and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Eilat stone and Achroite Optical Properties during the identification of gemstone. Specific gravity of Eilat stone is 2.90-3.40 whereas that of Achroite is 2.90-3.40.