limonite
Noun
Meaning
Hydrous sesquioxide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark brown color, and yellowish brown powder. It includes bog iron. Also called brown hematite.
Source: Webster's dictionarySynonyms
Hypernyms
Related terms
Examples
A clay of limonite rich in iron oxide is the source of raw sienna and burnt sienna.
A weathered and broken trachyte is host to the turquoise, which is found both in situ between layers of limonite and sandstone and amongst the scree at the mountain's base.
The brown, pink and red colors are from hematite (iron oxide; Femain Omain ); the yellows from limonite (FeO(OH)·nHmain O) ; and the purples are from pyrolusite ( Mn Omain ).
A significant portion of the Nevada material is also noted for its often attractive brown or black limonite veining, producing what is called "spiderweb matrix".
This kind of pigment is known as yellow ochre, yellow earth, limonite, or terra gialla.