Precious Opal and Montebrasite Physical Properties

Precious Opal

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

1.98-2.252.98-3.10

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

5-6.55.5-6

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Montebrasite Chemical Formula

While comparing Precious Opal 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 Precious Opal and Montebrasite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

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Precious Opal and Montebrasite Specific Gravity

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