Achroite and Kyanite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.40
3.53-3.65
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Splintery, Brittle, Metallic
Cleavage
Not Available
[100] perfect [010] imperfect with 79° angle between
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.
Not Available
Achroite and Kyanite Chemical Formula
While comparing Achroite and Kyanite 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 Kyanite 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.
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Achroite and Kyanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.