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