Danburite and Purpurite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.97-3.03
3.2-3.4
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
{001} Poor
[100] [001] perfect
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Danburite and Purpurite Chemical Formula
While comparing Danburite and Purpurite 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 Danburite and Purpurite chemical formula.
- Chemical formula of Danburite- CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Danburite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Danburite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Danburite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Danburite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.