Achroite and Wardite Physical Properties
Specific Gravity
2.90-3.40
2.81
Fracture
Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
Indiscernible
{001} Perfect
Mohs Hardness
7-7.5
4.5-5
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.
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Wardite Chemical Formula
While comparing Achroite and Wardite 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 Wardite 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 Wardite- NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Wardite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Wardite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Wardite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.81 whereas that of Wardite is 2.81.