Andalusite and Sellaite Physical Properties

Andalusite

Sellaite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.213.14-3.16

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Good on {110}, poor on {100}

Perfect on {010} and {110}

1.7 Mohs Hardness

7.55-5.5

2 10

1.8 Chemical Composition

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

MgF 2Ulrich Henn and Claudio C.

Andalusite and Sellaite Chemical Formula

While comparing Andalusite and Sellaite 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 Sellaite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

Compare Brown Gemstones

Andalusite Vs Augite

Andalusite Vs Baryte Barite

Andalusite Vs Baddeleyite

Andalusite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.