Howlite and Calcite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
2.67-2.73
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
None
Perfect on [10 1 1] three directions with angle of 74° 55
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.
Howlite and Calcite Chemical Formula
While comparing Howlite and Calcite 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 Howlite and Calcite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Howlite and Calcite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.