Rhodolite and Alexandrite Physical Properties

Rhodolite

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

3.843.69-3.81

1 7.18

1.5 Fracture

Conchoidal

Not Available

1.6 Cleavage

none, may show indistinct parting

1,1 ; 3,2.

1.7 Mohs Hardness

7-7.58.5

2 10

1.8 Chemical Composition

(Mg,Fe)₃Al₂Si₃O₁₂

BeAl ₂ O ₄

Rhodolite and Alexandrite Chemical Formula

While comparing Rhodolite 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 Rhodolite and Alexandrite chemical formula.

Chemical formula of Rhodolite- (Mg,Fe)₃Al₂Si₃O₁₂
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Rhodolite and Alexandrite Specific Gravity

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