Sellaite and Lazulite Physical Properties

Sellaite

Lazulite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.14-3.163.04-3.17

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gemstones of the world (2001) More from other references

1.6 Cleavage

Perfect on {010} and {110}

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

5-5.55.5

2 10

1.8 Chemical Composition

MgF 2Ulrich Henn and Claudio C.

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

Sellaite and Lazulite Chemical Formula

While comparing Sellaite and Lazulite 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 Sellaite and Lazulite chemical formula.

Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Sellaite and Lazulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sellaite and Lazulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sellaite and Lazulite Optical Properties during the identification of gemstone. Specific gravity of Sellaite is 3.04-3.17 whereas that of Lazulite is 3.04-3.17.