Opal and Gedrite Physical Properties

Opal

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

BrittleWalter Schumann

hot salt water

1.98-2.25

Conchoidal

None

5-6.5

SiO₂ · nH₂O

3.15-3.259

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

5.5-6

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

Opal and Gedrite Chemical Formula

While comparing 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 Opal and Gedrite chemical formula.

Compare Semi Precious Gemstones

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Opal and Gedrite Specific Gravity

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