Gedrite and Goethite Physical Properties
Specific Gravity
3.15-3.259
4.27-4.29
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Perfect {010}
Mohs Hardness
5.5-6
5-5.5
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
FeO(OH)Arthur Thomas , Gemstones (2009)
Gedrite and Goethite Chemical Formula
While comparing Gedrite and Goethite 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 Gedrite and Goethite chemical formula.
- Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Gedrite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gedrite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.