Diamond and Opal Physical Properties

Diamond

Opal

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Soluble

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.50-3.531.98-2.25

1 7.18

1.5 Fracture

Conchoidal

1.6 Cleavage

111 (perfect in four directions)

None

1.7 Mohs Hardness

105-6.5

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

Diamond and Opal Chemical Formula

While comparing Diamond and Opal 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 Diamond and Opal chemical formula.

Chemical formula of Diamond- C
Chemical formula of Opal- SiO₂ · nH₂O

Diamond and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Diamond and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diamond and Opal Optical Properties during the identification of gemstone. Specific gravity of Diamond is 1.98-2.25 whereas that of Opal is 1.98-2.25.