Grandidierite and Star Sapphire Physical Properties

Grandidierite

Star Sapphire

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.003.90-4.05

1 7.18

1.5 Fracture

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

Not Available

1.6 Cleavage

Perfect

Not Available

1.7 Mohs Hardness

7.5Not Available

2 10

1.8 Chemical Composition

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Al 2O 3Ulrich Henn and Claudio C.

Grandidierite and Star Sapphire Chemical Formula

While comparing Grandidierite 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 Grandidierite and Star Sapphire chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Compare Green Gemstones

Grandidierite Vs Hiddenite

Grandidierite Vs Hydrogrossular

Grandidierite Vs Hurlbutite

Grandidierite and Star Sapphire Specific Gravity

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