Stichtite and Alexandrite Physical Properties

Stichtite

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

2.11-2.20

3.69-3.81

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Uneven

Not Available

1.6 Cleavage

Perfect on {0001}

1,1 ; 3,2.

1.7 Mohs Hardness

Not Available

8.5

1.8 Chemical Composition

Mg 6Cr 2(CO 3)(OH) 16 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

BeAl ₂ O ₄

Stichtite and Alexandrite Chemical Formula

While comparing Stichtite 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 Stichtite and Alexandrite chemical formula.

Chemical formula of Stichtite- Mg 6Cr 2(CO 3)(OH) 16 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Stichtite and Alexandrite Specific Gravity

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