Opal and Milarite Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.52-2.60
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
None
{0001} Imperfect, {1120} Imperfect
Mohs Hardness
5-6.5
5.5-6
Chemical Composition
SiO2 · nH2O
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Milarite Chemical Formula
While comparing Opal and Milarite 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 Milarite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Milarite- KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Milarite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Milarite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Milarite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.52-2.60 whereas that of Milarite is 2.52-2.60.