Description
Feldspar is the
most common rock-forming mineral (about *0% of the earth’s crust)
(Kauffman and Van Dyk, ***4). The mineral name feldspar is derived
from the German words feld + spar. The word "feld" is "field" in
German and "spar" is a term for light colored minerals that break
with a smooth surface. Feldspar minerals are usually white or very
light in color, have a hardness of 6 on the Mohs’ Scale of Hardness
and perfect to good cleavage (plane of breakage) in two
directions.
Feldspar is a
common name that applies to a group of minerals with a general
chemical formula of x Al(Al,Si)3O8, where x can be sodium (Na)
and/or calcium (Ca) and/or potassium (K). (Specific compositional
varieties (i.e. albite, microcline…) are discussed under Mineral
Descriptions).
Feldspar occurs
in igneous, metamorphic and sedimentary rocks and thus can be found
throughout North Carolina. It is more commonly found in igneous and
metamorphic rocks of the Blue Ridge and Piedmont provinces.
Feldspar weathers to kaolin which is the main clay mineral used in
ceramics and fine
pottery.
We sell
feldspar high quality potassium content *1.5% , this beside mud,
quartz and others
We also
sell medium feldspar ***0% potassium content,
.
We have
also quartz one face *9.8 silica
Capacity
fo our mill : ***0 ton/month
Pls.
contact: sayed zaki
