Opal and Stichtite Physical Properties

Opal

Stichtite

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1 Physical Properties

1.1 Tenacity

BrittleWalter Schumann

Not Available

1.2 Solubility

hot salt water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.252.11-2.20

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

None

Perfect on {0001}

1.7 Mohs Hardness

5-6.5Not Available

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

Mg 6Cr 2(CO 3)(OH) 16 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Opal and Stichtite Chemical Formula

While comparing Opal and Stichtite 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 Stichtite chemical formula.

Chemical formula of Opal- SiO₂ · nH₂O
Chemical formula of Stichtite- Mg 6Cr 2(CO 3)(OH) 16 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Semi Precious Gemstones

Opal Vs Lehsunia

Opal Vs Amethyst

Opal Vs Alexandrite

Opal and Stichtite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Stichtite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Stichtite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.11-2.20 whereas that of Stichtite is 2.11-2.20.