Alexandrite and Montebrasite Physical Properties

Alexandrite

Montebrasite

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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

3.69-3.812.98-3.10

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

{100} Perfect, {110} Good, {011} Distinct

1.7 Mohs Hardness

8.55.5-6

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

Alexandrite and Montebrasite Chemical Formula

While comparing Alexandrite and Montebrasite 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 Montebrasite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

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Alexandrite and Montebrasite Specific Gravity

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