Carnelian and Lazurite Physical Properties

Carnelian

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

2.58-2.64

2.75

1.5 Fracture

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Absent

Imperfect on {110}

1.7 Mohs Hardness

6.5-7

5.5

1.8 Chemical Composition

SiO₂

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

Carnelian and Lazurite Chemical Formula

While comparing Carnelian 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 Carnelian and Lazurite chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

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Carnelian and Lazurite Specific Gravity

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