Boracite and Iolite Physical Properties

Boracite

Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.95-2.962.6-2.7

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

None

3,1

1.7 Mohs Hardness

7-7.57-7.5

2 10

1.8 Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Boracite and Iolite Chemical Formula

While comparing Boracite and Iolite 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 Boracite and Iolite chemical formula.

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

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Boracite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boracite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boracite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Boracite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.