Howlite and Gypsum Physical Properties
Tenacity
Not Available
Flexible
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
2.20-2.40
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
Cleavage
None
Perfect on {010}, distinct on {100}
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Howlite and Gypsum Chemical Formula
While comparing Howlite and Gypsum 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 Gypsum chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Howlite and Gypsum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.