Achroite and Ceylonite Physical Properties
Specific Gravity
2.90-3.40
3.63-3.9
Fracture
Uneven, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Indiscernible
Indistinct
Mohs Hardness
7-7.5
7.5-8
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.
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Achroite and Ceylonite Chemical Formula
While comparing Achroite and Ceylonite 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 Ceylonite 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 Ceylonite- (Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Achroite and Ceylonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Ceylonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Ceylonite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.63-3.9 whereas that of Ceylonite is 3.63-3.9.