Oligoclase and Howlite Physical Properties

Oligoclase and Howlite Chemical Formula

While comparing Oligoclase 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 Oligoclase and Howlite chemical formula.

• Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Oligoclase and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Howlite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 2.45-2.58 whereas that of Howlite is 2.45-2.58.