Sard and Sellaite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.58-2.63
3.14-3.16
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
Not Available
Perfect on {010} and {110}
Mohs Hardness
6.5-7
5-5.5
Chemical Composition
SiO 2Ulrich Henn and Claudio C.
MgF 2Ulrich Henn and Claudio C.
Sard and Sellaite Chemical Formula
While comparing Sard and Sellaite 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 Sard and Sellaite chemical formula.
- Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
- Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
Sard and Sellaite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sard and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sard and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Sard is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.