Ulexite and Star Sapphire Physical Properties

Ulexite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.65-1.993.90-4.05

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

{010} Perfect, {110} Perfect

Not Available

1.7 Mohs Hardness

2-2.5Not Available

2 10

1.8 Chemical Composition

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

Al 2O 3Ulrich Henn and Claudio C.

Ulexite and Star Sapphire Chemical Formula

While comparing Ulexite and Star Sapphire 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 Ulexite and Star Sapphire chemical formula.

Chemical formula of Ulexite- NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Ulexite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ulexite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ulexite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Ulexite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.