Boulder Opal and Diaspore Physical Properties

Boulder Opal

Diaspore

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

1.98-2.25

Conchoidal

None

5-6.5

SiO 2 + H 2OUlrich Henn and Claudio C.

Very brittle

insoluble

3.30-3.40

Conchoidal

{010} perfect, {110} distinct, {100} in traces

6.5-7

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Boulder Opal and Diaspore Chemical Formula

While comparing Boulder Opal and Diaspore 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 Boulder Opal and Diaspore chemical formula.

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Boulder Opal and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal Vs Diaspore during the identification of gemstone. Specific gravity of Boulder Opal is whereas that of Diaspore is .