Faustite and Alexandrite Physical Properties

Faustite

Alexandrite

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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

2.9

3.69-3.81

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Not Available

1.6 Cleavage

{???} Indistinct

1,1 ; 3,2.

1.7 Mohs Hardness

4.5

8.5

1.8 Chemical Composition

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

BeAl ₂ O ₄

Faustite and Alexandrite Chemical Formula

While comparing Faustite and Alexandrite 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 Alexandrite 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 Alexandrite- BeAl ₂ O ₄

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Faustite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.