Goethite and Rock Crystal Physical Properties
Tenacity
Not Available
Not Available
Solubility
HCl soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
2.65
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect {010}
Not Available
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
SiO 2Walter Schumann , Gemstones of the world (2001)
Goethite and Rock Crystal Chemical Formula
While comparing Goethite and Rock Crystal 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 Goethite and Rock Crystal chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Goethite and Rock Crystal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.65 whereas that of Rock Crystal is 2.65.