Thulite and Achroite Physical Properties

Thulite

Achroite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.1

Uneven, Conchoidal

Perfect {010} imperfect {100}

6-7

Ca₂Al₃(SiO₄)₃(OH)

2.90-3.40

Uneven, ConchoidalWalter Schumann

Indiscernible

7-7.5

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.

Thulite and Achroite Chemical Formula

While comparing Thulite 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 Thulite and Achroite chemical formula.

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Thulite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thulite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thulite Vs Achroite during the identification of gemstone. Specific gravity of Thulite is whereas that of Achroite is .