Diaspore and Howlite Physical Properties
Tenacity
Very brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.30-3.40
2.45-2.58
Fracture
Conchoidal, Brittle, Conchoidal
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
{010} perfect, {110} distinct, {100} in traces
None
Mohs Hardness
6.5-7
3-3.5
Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Diaspore and Howlite Chemical Formula
While comparing Diaspore 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 Diaspore and Howlite chemical formula.
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Diaspore and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Diaspore and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diaspore and Howlite Optical Properties during the identification of gemstone. Specific gravity of Diaspore is 2.45-2.58 whereas that of Howlite is 2.45-2.58.