Andalusite and Siderite Physical Properties

Andalusite

Siderite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.213.83-3.89

1 7.18

1.5 Fracture

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

Uneven, Conchoidal, UnevenArthur Thomas, Brittle

1.6 Cleavage

Good on {110}, poor on {100}

Perfect on {01 1 1}

1.7 Mohs Hardness

7.53.5-4.5

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Andalusite and Siderite Chemical Formula

While comparing Andalusite 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 Andalusite and Siderite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Andalusite and Siderite Specific Gravity

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