Lazurite and Siderite Physical Properties

Lazurite

Siderite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.753.83-3.89

1 7.18

1.5 Fracture

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

Uneven, Conchoidal, UnevenArthur Thomas, Brittle

1.6 Cleavage

Imperfect on {110}

Perfect on {01 1 1}

1.7 Mohs Hardness

5.53.5-4.5

2 10

1.8 Chemical Composition

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

Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Lazurite and Siderite Chemical Formula

While comparing Lazurite and Siderite 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 Lazurite and Siderite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Lazurite and Siderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Siderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Siderite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 3.83-3.89 whereas that of Siderite is 3.83-3.89.