Tenacity
-
-
Solubility
HCl soluble
-
Durability
-
-
Specific Gravity
4.27-4.29-9999
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Perfect {010}
None
Mohs Hardness
5-5.53-4
2
10
👆🏻
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite