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Boulder Opal
Boulder Opal

Siderite
Siderite



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Boulder Opal
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Siderite

Boulder Opal and Siderite Physical Properties

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.
 
Brittle
-
-
3.83-3.89
Uneven, Conchoidal
Perfect on {01 1 1}
3.5-4.5
Fe2+ CO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boulder Opal and Siderite Chemical Formula

While comparing Boulder Opal and Siderite 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 Siderite chemical formula.

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Boulder Opal and Siderite Specific Gravity

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