mineral feldspar
University of Minnesota's Mineral Pages: Potassium Feldspar
A combination of hardness, nonmetallic luster and two good cleavage directions at right angles to one another serves to distinguish the feldspar minerals from most ...
USGS Minerals Information: Feldspar
Statistics and information on the worldwide supply, demand, and flow of feldspar
feldspar Chemical composition | mineral |
feldspar Chemical composition: All the rockforming feldspars are alumino silicate minerals with the general formula AT 4 O 8 in which A = potassium, sodium, or ...
feldspar | mineral |
feldspar: Any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium. Feldspars make up more than half of Earth's crust, and professional ...
Feldspar Distinctions, Characteristics Identification
An overview of the most common mineral in the Earth's crust, feldspar how to identify it and further information.
Feldspar | Minerals Education Coalition
Feldspar is the name given to a group of minerals distinguished by the presence of alumina and silica (SiO2) in their chemistry. This group includes alumi
Feldspar Wikipedia
The change from Spat to spar was influenced by the English word spar, a synonym for "mineral". Feldspathic refers to materials that contain feldspar.
THE FELDSPAR GROUP Amethyst Galleries' Mineral Gallery
The feldspar group is a fairly large group with nearly 20 members recognized, but only nine are well known and common. Those few, however, make up the greatest ...
