Alkali feldspar granite Alkali feldspar granite Alkali feldspar granite, some varieties of which are called 'red granite', is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar (K-spar). It is a dense rock with a phaneritic texture. The abundance of K-spar gives the rock a predominant pink to reddish hue; peppered with minor amounts of black minerals. As shown in the QAPF diagram, alkali feldspar granite contains between 20% - 60% quartz. Less quartz content would lead to "quartz alkali feldspar syenite". More than 90% of the total feldspar content is in the form of alkali feldspar.
Granite, Colorado inches is provided for it is not considered that the prescribed limit can with reasonable safety be exceeded. While Granite is a ghost of what it once was, what with both a railroad and a major highway running through it has survived the years. However, many old ghost towns remain in the hills surrounding Granite. As the prospectors searched for gold, every Arkansas River tributary was a potential gold mining site and a chance to strike it rich. About two miles south of Granite, Clear Creek empties into the Arkansas River. Although prospecting took place in this area as early