Alexandrite and Holmquistite Physical Properties

Alexandrite

Holmquistite

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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

3.69-3.812.95-3.13

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

1,1 ; 3,2.

{210} Perfect

1.7 Mohs Hardness

8.55-6

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Alexandrite and Holmquistite Chemical Formula

While comparing Alexandrite and Holmquistite 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 Alexandrite and Holmquistite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Holmquistite- Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Alexandrite and Holmquistite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Holmquistite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Holmquistite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.95-3.13 whereas that of Holmquistite is 2.95-3.13.