Wood Opal and Spinel Physical Properties

Wood Opal

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.503.64-3.66

1 7.18

1.5 Fracture

Not Available

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

None, but may exhibit slight parting

1.7 Mohs Hardness

5.5-6.58

2 10

1.8 Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

MgAl₂O₄

Wood Opal and Spinel Chemical Formula

While comparing Wood Opal and Spinel 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 Wood Opal and Spinel chemical formula.

Chemical formula of Wood Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Spinel- MgAl₂O₄

Compare Gems Found In Australia

Wood Opal Vs Canadian Ammolite

Wood Opal Vs Alunite

Wood Opal Vs Druzy

Wood Opal and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Wood Opal and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Wood Opal and Spinel Optical Properties during the identification of gemstone. Specific gravity of Wood Opal is 3.64-3.66 whereas that of Spinel is 3.64-3.66.