Faustite and Prehnite Physical Properties

Faustite

Prehnite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.92.80-2.95

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

1.6 Cleavage

{???} Indistinct

Distinct on [001]

1.7 Mohs Hardness

4.56-6.5

2 10

1.8 Chemical Composition

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

Ca₂Al₂Si₃O₁₂(OH)

Faustite and Prehnite Chemical Formula

While comparing Faustite and Prehnite 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 Prehnite 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 Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Faustite and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.