Sesame gray is one of the color descriptions of stone. Sesame gray granite is one of the most famous granite species in the world. It can be used as a material for various building and garden stones such as slabs, floor paving, countertops, carvings, engineering exterior wall panels, interior wall panels, floors, square engineering panels, environmental decorative curbstones, etc.
The granite rock body belongs to quartz diorite, which is distributed in the NE-SW direction and exposed in the area of ​​Tanhong Zhou and Xinzhai Dalai. The vein is about 5 kilometers long and 2.5 kilometers wide. The exposed area of ​​the ore body is about 12 square kilometers. It intruded into the Lower Cretaceous System of the Mesozoic Era (K1c2) and belongs to the granite body of the second stage of the early Yanshan period. The ore body is partially exposed, and there is a certain coverage in the concave area near the mountain or where there is more vegetation. In general, the stripping rate is good, the integrity of the ore body is good, and the block size is large, which is suitable for open-pit mining.
Granite is fully crystalline, with a granular and massive structure. The ore is gray-black or sesame-gray. The main minerals of natural stone are quartz and plagioclase. The minor minerals are common hornblende, pyroxene, biotite, and a small amount of pyrite occasionally. The secondary minerals are chlorite and sericite.