Esperite and Lazurite Physical Properties

Esperite

Lazurite

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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

4.28-4.422.75

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

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

Imperfect on {110}

1.7 Mohs Hardness

5-5.55.5

2 10

1.8 Chemical Composition

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

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Esperite and Lazurite Chemical Formula

While comparing Esperite and Lazurite 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 Esperite and Lazurite chemical formula.

Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Compare White Gemstones

Esperite Vs Hardystonite

Esperite Vs Hydrogrossular

Esperite Vs Hackmanite

Esperite and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Esperite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Esperite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Esperite is 2.75 whereas that of Lazurite is 2.75.