Selenite and Howlite Physical Properties

Selenite and Howlite Chemical Formula

While comparing Selenite 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 Selenite and Howlite chemical formula.

• Chemical formula of Selenite- CaSO4·2H2O
• Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Selenite and Howlite Specific Gravity

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