Fluorapatite and Alexandrite Physical Properties

Fluorapatite

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

3.1-3.253.69-3.81

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

Not Available

1.6 Cleavage

Indistinct

1,1 ; 3,2.

1.7 Mohs Hardness

58.5

2 10

1.8 Chemical Composition

Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)

BeAl ₂ O ₄

Fluorapatite and Alexandrite Chemical Formula

While comparing Fluorapatite 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 Fluorapatite and Alexandrite chemical formula.

Chemical formula of Fluorapatite- Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Fluorapatite and Alexandrite Specific Gravity

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