Opal and Gedrite Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
3.15-3.259
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Not Available
Cleavage
None
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Mohs Hardness
5-6.5
5.5-6
Chemical Composition
SiO2 · nH2O
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Opal and Gedrite Chemical Formula
While comparing Opal and Gedrite 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 Gedrite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Opal and Gedrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.