Howlite and Atacamite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.745-3.776
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Conchoidal, Brittle
Cleavage
None
Perfect on {010}, fair on {101}
Mohs Hardness
3-3.5
3-3.5
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu2Cl(OH)3
Howlite and Atacamite Chemical Formula
While comparing Howlite and Atacamite 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 Atacamite chemical formula.
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Atacamite- Cu2Cl(OH)3
Howlite and Atacamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Howlite and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.