Iolite and Boracite Physical Properties

Iolite

Boracite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.95-2.96

1 7.18

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

3,1

None

1.7 Mohs Hardness

7-7.57-7.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Iolite and Boracite Chemical Formula

While comparing Iolite and Boracite 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 Iolite and Boracite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Boracite- Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Iolite and Boracite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Boracite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Boracite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.95-2.96 whereas that of Boracite is 2.95-2.96.