Achroite and Hemimorphite Physical Properties

Achroite

Hemimorphite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.403.30-3.50

1 7.18

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Not Available

Perfect on {110}, poor on {101}, {001} rare

1.7 Mohs Hardness

7-7.55

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.

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Achroite and Hemimorphite Chemical Formula

While comparing Achroite and Hemimorphite 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 Hemimorphite 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 Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Achroite and Hemimorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.