Stone Type (Commercial): Quartz-based Availability: Available Stone Type ... is no appreciable void space. Of the detrital grains, quartz comprises about over 95 percent, but a majority of this is in ... forms indicative of plutonic, metamorphic, or even arenite rock fragments. Rare feldspar , opaque, and other mafic mineral ...
Intern - 2015-09-05
Stone Type (Commercial): Quartz-based Description: On our wish list for a sample. ... The Portland Brownstone is a coarse sandstone (feldspathic arenite), with feldspar content as high as 65%. Quartz and mica comprise most ...
Matt Pailes - 2015-08-24