Goethite and Aragonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
HCl soluble
Dilute acid
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
2.93-2.96
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect {010}
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
5-5.5
3.5-4
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Goethite and Aragonite Chemical Formula
While comparing Goethite and Aragonite 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 Aragonite chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Goethite and Aragonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.