Stibiotantalite and Lazurite Physical Properties

Stibiotantalite

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

Not Available2.75

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

{???} Perfect

Imperfect on {110}

1.7 Mohs Hardness

5.5-65.5

2 10

1.8 Chemical Composition

SbTaO 4Ulrich Henn and Claudio C.

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

Stibiotantalite and Lazurite Chemical Formula

While comparing Stibiotantalite 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 Stibiotantalite and Lazurite chemical formula.

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

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Stibiotantalite and Lazurite Specific Gravity

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