Sillimanite and Sellaite Physical Properties

Sillimanite

Sellaite

Add ⊕

1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.263.14-3.16

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

Perfect on {010} and {110}

1.7 Mohs Hardness

6-7.55-5.5

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

MgF 2Ulrich Henn and Claudio C.

Sillimanite and Sellaite Chemical Formula

While comparing Sillimanite 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 Sillimanite and Sellaite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

Compare Blue Gemstones

Sillimanite Vs Starlite

Sillimanite Vs Strontium Titanate

Sillimanite Vs Tanzanite

Sillimanite and Sellaite Specific Gravity

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