Biotite and Amblygonite Physical Properties

Biotite

Amblygonite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.32.98-3.10

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Sub-Conchoidal, Irregular/uneven, Sub-Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on the {001}

[100] Perfect, [110] Good, [011] Distinct

1.7 Mohs Hardness

2.5-3.06

2 10

1.8 Chemical Composition

K(Mg,Fe++)3[AlSi3O10(OH,F)2

(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Biotite and Amblygonite Chemical Formula

While comparing Biotite and Amblygonite 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 Biotite and Amblygonite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Amblygonite- (Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Biotite and Amblygonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Amblygonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Amblygonite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.98-3.10 whereas that of Amblygonite is 2.98-3.10.