Goethite and Carnelian Physical Properties
Tenacity
Not Available
Not Available
Solubility
HCl soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
2.58-2.64
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect {010}
Absent
Mohs Hardness
5-5.5
6.5-7
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
SiO2
Goethite and Carnelian Chemical Formula
While comparing Goethite and Carnelian 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 Carnelian chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Carnelian- SiO2
Goethite and Carnelian Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Carnelian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Carnelian Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.58-2.64 whereas that of Carnelian is 2.58-2.64.