Faustite and Common Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.9
1.98-2.50
Fracture
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
{???} Indistinct
Not Available
Mohs Hardness
4.5
5.5-6.5
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Faustite and Common Opal Chemical Formula
While comparing Faustite and Common Opal 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 Faustite and Common Opal chemical formula.
- Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Faustite and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Faustite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Faustite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.