Brucite and Gahnite Physical Properties
Tenacity
Sectile
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.39
  
4.00-4.62
  
Fracture
Irregular
  
Conchoidal, Uneven
  
Cleavage
Perfect on {0001}
  
Indistinct parting on [111]
  
Mohs Hardness
2.5
  
7.5-8
  
Chemical Composition
Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Brucite and Gahnite Chemical Formula
While comparing Brucite and Gahnite 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 Brucite and Gahnite chemical formula.
- Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Brucite and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Brucite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brucite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Brucite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.