Periclase and Howlite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.7-3.9
2.45-2.58
Fracture
Conchoidal, Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
None
Mohs Hardness
5.5-6
3-3.5
Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Periclase and Howlite Chemical Formula
While comparing Periclase 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 Periclase and Howlite chemical formula.
- Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Periclase and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Periclase and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Periclase and Howlite Optical Properties during the identification of gemstone. Specific gravity of Periclase is 2.45-2.58 whereas that of Howlite is 2.45-2.58.