Obsidian and Londonite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.35-2.60
3.34
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Not Available
None
Mohs Hardness
5-5.5
Not Available
Chemical Composition
Not Available
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Obsidian and Londonite Chemical Formula
While comparing Obsidian and Londonite 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 Obsidian and Londonite chemical formula.
>- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Obsidian and Londonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Londonite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.34 whereas that of Londonite is 3.34.