Peridot and Achroite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.54-1.55
2.90-3.40
Fracture
Conchoidal
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Poor
Not Available
Mohs Hardness
6.5-7
7-7.5
Chemical Composition
(Mg,Fe)2SiO4
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.
Peridot and Achroite Chemical Formula
While comparing Peridot 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 Peridot and Achroite chemical formula.
- Chemical formula of Peridot- (Mg,Fe)2SiO4
- 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.
Peridot and Achroite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Peridot and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Achroite Optical Properties during the identification of gemstone. Specific gravity of Peridot is 2.90-3.40 whereas that of Achroite is 2.90-3.40.