Opal and Faustite Physical Properties

Opal

Faustite

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1 Physical Properties

1.1 Tenacity

BrittleWalter Schumann

Not Available

1.2 Solubility

hot salt water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.252.9

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

1.6 Cleavage

None

{???} Indistinct

1.7 Mohs Hardness

5-6.54.5

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

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

Opal and Faustite Chemical Formula

While comparing 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 Opal and Faustite chemical formula.

Chemical formula of Opal- SiO₂ · nH₂O
Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Semi Precious Gemstones

Opal Vs Lehsunia

Opal Vs Amethyst

Opal Vs Alexandrite

Opal and Faustite Specific Gravity

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