Achroite and Beryllonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.40
2.79-2.87
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Not Available
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
7-7.5
5.5-6
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.
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Beryllonite Chemical Formula
While comparing Achroite and Beryllonite 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 Beryllonite 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 Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Beryllonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.