Sillimanite and Ulexite Physical Properties

Sillimanite

Ulexite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.261.65-1.99

1 7.18

1.5 Fracture

Splintery

UnevenAnthony et al, Uneven, UnevenAnthony et al, Uneven, Brittle, Metallic

1.6 Cleavage

{010} perfect

{010} Perfect, {110} Perfect

1.7 Mohs Hardness

6-7.52-2.5

2 10

1.8 Chemical Composition

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

NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Sillimanite and Ulexite Chemical Formula

While comparing Sillimanite and Ulexite 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 Ulexite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Ulexite- NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Sillimanite and Ulexite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Ulexite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Ulexite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 1.65-1.99 whereas that of Ulexite is 1.65-1.99.