Opal and Scapolite Physical Properties

Opal

Scapolite

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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

1.98-2.252.58-2.74

1 7.18

1.5 Fracture

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

ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Splintery

1.6 Cleavage

None

{100} Distinct, {110} Distinct

1.7 Mohs Hardness

5-6.55.5-6

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Opal and Scapolite Chemical Formula

While comparing Opal and Scapolite 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 Scapolite chemical formula.

Chemical formula of Opal- SiO₂ · nH₂O
Chemical formula of Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Semi Precious Gemstones

Opal Vs Lehsunia

Opal Vs Amethyst

Opal Vs Alexandrite

Opal and Scapolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Scapolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Scapolite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.58-2.74 whereas that of Scapolite is 2.58-2.74.