Siderite and Anhydrite Physical Properties

Siderite

Anhydrite

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2 Physical Properties

2.1 Tenacity

Brittle

2.4 Solubility

Not Available

2.6 Durability

Not Available

2.7 Specific Gravity

3.83-3.892.90-2.98

1 7.18

3.6 Fracture

Uneven, Conchoidal, UnevenArthur Thomas, Brittle

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

3.7 Cleavage

Perfect on {01 1 1}

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

3.8 Mohs Hardness

3.5-4.53.5

2 10

3.14 Chemical Composition

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

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Siderite and Anhydrite Chemical Formula

While comparing Siderite and Anhydrite 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 Siderite and Anhydrite chemical formula.

Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Siderite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Siderite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Siderite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Siderite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.