Thulite and Esperite Physical Properties

Thulite

Esperite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.14.28-4.42

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic

1.6 Cleavage

Perfect {010} imperfect {100}

Distinct on [010] and [100] poor on [101]

1.7 Mohs Hardness

6-75-5.5

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Thulite and Esperite Chemical Formula

While comparing Thulite and Esperite 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 Esperite chemical formula.

Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Thulite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thulite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thulite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Thulite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.