Achroite and Hardystonite Physical Properties

Achroite

Hardystonite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.403.396-3.443

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

Brittle, Metallic

1.6 Cleavage

Not Available

[001] good, [100] and [110] fair

1.7 Mohs Hardness

7-7.53-4

2 10

1.8 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.

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Achroite and Hardystonite Chemical Formula

While comparing Achroite and Hardystonite 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 Hardystonite 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 Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Compare Gems Found in South Asia

Achroite Vs Apatite

Achroite Vs Aquamarine

Achroite Vs Apophyllite

Achroite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.