from The Century Dictionary.
- A mineral or salt occurring in masses of a fibrous structure, of a brick-red color, being tinged with iron.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
mineralusually occurring in fibrousmasses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda.
Sorry, no etymologies found.
That boom has the blessing of the national government, whose regional growth fund awarded Cleveland Potash a £15-million $23.4-million grant to build a polyhalite processing facility in the Tees Valley.
Weeks later, however, the company said that the first drilling work had found a seam of polyhalite that was four times thicker than expected.
It is targeting the deep layer of polyhalite - a material that can be processed in potash fertilizer - that Sirius also plans to extract.
The potassium salts like carnallite, langbeinite, polyhalite, and sylvite are found in ancient lake and sea beds.