Opal and Antigorite Physical Properties

Opal

Antigorite

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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

1.98-2.25

2.58-2.80

1.5 Fracture

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

Conchoidal, Brittle, Metallic, Conchoidal, Handbook of mineralogy (2001)

1.6 Cleavage

None

{001} Good

1.7 Mohs Hardness

5-6.5

5-5.5

1.8 Chemical Composition

SiO₂ · nH₂O

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Opal and Antigorite Chemical Formula

While comparing Opal and Antigorite 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 Antigorite chemical formula.

Chemical formula of Opal- SiO₂ · nH₂O
Chemical formula of Antigorite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Compare Semi Precious Gemstones

Opal Vs Alexandrite

Opal Vs Amethyst

Opal Vs Lehsunia

Opal and Antigorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Antigorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Antigorite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.58-2.80 whereas that of Antigorite is 2.58-2.80.