Definitions for "Feldspar"
A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The colors are usually white or nearly white, flesh-red, bluish, or greenish.
A group of common aluminum silicate minerals that contains potassium, sodium, or calcium.
A group of rock-forming minerals that make up about 60% of the Earth's crust.
Ingredient found in petuntse which fuses and vitrfies at 1450 to about 2600 degree centigrade.
Keywords:  ferric, ferrous, felting
Felting Ferric, Ferrous
Mild respiratory irritant. Used in some all-purpose cleaners.