Spinel and Rubellite Physical Properties

Spinel

Rubellite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.01-3.06

1 7.18

2.6 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

2.7 Cleavage

None, but may exhibit slight parting

Not Available

2.8 Mohs Hardness

87-7.5

2 10

2.12 Chemical Composition

MgAl₂O₄

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Spinel and Rubellite Chemical Formula

While comparing Spinel and Rubellite 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 Spinel and Rubellite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Compare Gems for Scorpio

Spinel Vs Azurmalachite

Spinel Vs Ametrine

Spinel Vs Charoite

Spinel and Rubellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.