Boulder Opal and Gedrite Physical Properties

Boulder Opal

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

1.98-2.253.15-3.259

1 7.18

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Fracture

Conchoidal

Cleavage

None

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

Mohs Hardness

5-6.55.5-6

2 10

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Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Boulder Opal and Gedrite Chemical Formula

While comparing Boulder Opal and Gedrite 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 Gedrite chemical formula.

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Boulder Opal Vs Common Opal

Boulder Opal Vs Cordierite Iolite

Boulder Opal and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.