Precious Opal and Faustite Physical Properties

Precious Opal

Faustite

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1 Physical Properties

1.1 Tenacity

Not Available

1.5 Solubility

Not Available

1.8 Durability

Not Available

1.10 Specific Gravity

1.98-2.252.9

1 7.18

1.12 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

1.13 Cleavage

Not Available

{???} Indistinct

1.15 Mohs Hardness

5-6.54.5

2 10

1.20 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Faustite Chemical Formula

While comparing Precious Opal 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 Precious Opal and Faustite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

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Precious Opal Vs Sardonyx

Precious Opal and Faustite Specific Gravity

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