Iolite and Faustite Physical Properties

Iolite

Faustite

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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

2.6-2.72.9

1 7.18

1.5 Fracture

Not Available

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

1.6 Cleavage

3,1

{???} Indistinct

1.7 Mohs Hardness

7-7.54.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Iolite and Faustite Chemical Formula

While comparing Iolite and Faustite 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 Faustite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Iolite and Faustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.9 whereas that of Faustite is 2.9.