Home
Gemstones


Opal and Coral Physical Properties


Coral and Opal Physical Properties


Physical Properties

Tenacity
BrittleWalter Schumann   
Not Available   

Solubility
hot salt water   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.98-2.25   
2.60-2.70   

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

Cleavage
None   
Not Available   

Mohs Hardness
5-6.5   
3-4   

Chemical Composition
SiO2 · nH2O   
CaCO 3Ulrich Henn and Claudio C.   

Optical Properties >>
<< Astrology

Opal and Coral Chemical Formula

While comparing Opal and Coral 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 Coral chemical formula.

Compare Semi Precious Gemstones

Opal and Coral Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Coral Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Coral Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.60-2.70 whereas that of Coral is 2.60-2.70.

Semi Precious

Semi Precious


Compare Semi Precious Gemstones