Bertrandite and Lazulite Physical Properties

Bertrandite

Lazulite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.59-2.60

{001} Perfect, {110} Distinct, {101} Distinct

6-7

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

3.04-3.17

Uneven

{001} Indistinct, {???} Indistinct

5.5

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

Bertrandite and Lazulite Chemical Formula

While comparing Bertrandite 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 Bertrandite and Lazulite chemical formula.

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Bertrandite and Lazulite Specific Gravity

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