Hibonite and Howlite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.84
2.45-2.58
Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
{0001} good, {10 1 0} parting
None
Mohs Hardness
7.5-8
3-3.5
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Hibonite and Howlite Chemical Formula
While comparing Hibonite and Howlite 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 Hibonite and Howlite chemical formula.
- Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Hibonite and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hibonite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hibonite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Hibonite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.