Howlite and Brookite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.87-4.14
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
None
Poor on {120}, in traces on {001}
Mohs Hardness
3-3.5
5.5-6
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Howlite and Brookite Chemical Formula
While comparing Howlite and Brookite 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 Brookite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Howlite and Brookite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.