How to distinguish quartz sandstone granite
Quartz sandstone is terrigenous clastic sedimentary rock, the main component is quartz, quartz content accounted for more than 95%. The sedimentary tectonic development, common bedding, ripple structure. Sand particle size between 0.05mm-2mm particles by the cements, cement quartz, calcite, glauconite etc..
Sandstone: a consolidated medium grained clastic sedimentary rock, in which the particle size of 0625 ~ 2 mm of sand content accounted for more than 50%, the rest of the matrix or cement. The main composition of sand is quartz, followed by feldspar, mica, cuttings, etc., the composition of the composition of silica, iron, calcium.
Granite: SiO2 content in more than 70%, the color is shallow, with gray, red meat is more common. Mainly composed of quartz, feldspar and a small amount of dark minerals. Quartz content above 20%. Alkali feldspar is often more than plagioclase. Plagioclase is mainly acidic and alkaline feldspar is a variety of K-feldspar and albite. Dark minerals are mainly biotite.
Granite is poured into the acidic magmatite, the content of SiO2 is greater than 66%, is the main component of feldspar, plagioclase (including white) and potassium feldspar (red meat), and transparent quartz, dark minerals to lamellar biotite, low content. The magmatic rocks are characterized by a large number of mineral particles, some of which have a diameter of up to a few centimeters and a crystal of about 5mm. In fact, the distribution of granite is more extensive in our daily life, many white, black, red, red, white and so on the floor are granite!
