Achroite and Emerald Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Hard
Specific Gravity
2.90-3.40
2.67-2.78
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Not Available
Imperfect on the [0001]
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.
Be3Al2SiO6
Achroite and Emerald Chemical Formula
While comparing Achroite and Emerald 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 Emerald 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 Emerald- Be3Al2SiO6
Achroite and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.