Feldspar (German: Feldspat) pertains to the mineral found in granite which melts around 2300 fahrenheit, used as a flux in clay bodies  and glazes.

When feldspar rock loses its alkaline content through decomposition it becomes kaolin which is the origin of clay.

One of a group of rock-forming  minerals, the most abundant group in the Earth's crust. They are the chief constituents of igneous rock and are present in most metamorphic and sedimentary rocks. All feldspars contain silicon, aluminum, oxygen, linked together to form a framework; spaces within this structure are occupied by sodium, potassium, calcium, or occasionally barium, in various proportions.
Feldspars form white, gray, or pink crystals and rank 6 on the Mohs? scale of hardness.

See also:
"Feldspar" is in the UNSPSC Code "11101514"

"Feldspar" is in the NAICS Code "339942"
  Lead Pencil and Art Good Manufacturing
  Feldspar mining and/or beneficiating

Ref: 123818/2006-09-23

Other Database Pages Exist for this Phrase:
Fireclay  (Fireclay refers to a  variation of vitreous  china ...)
Porcelain  (Porcelain refers to a  white ceramic ware that ...)
Granite (Granite is described as a  coarse grained igneous ...)

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