What characteristic are Granite, diorite, rhyolite ？

    Granite is the application of the oldest, most widely use, the amount is more rock, the earth's crust is the most common rock. Generally is light-colored, mostly gray, light gray, red, red meat．Chemical Composition

    ConcludingSiO2 ＞65%，Fe2O3、FeO、MgO＜2%，CaO＜3%。Alumina is the main mineral component mainly light-colored minerals, iron magnesium mafic minerals less. Alumina mainly alkaline mineral feldspar quartz, feldspar acidic oblique about 85%, quartz content greater than 20%.Rail magnesium mineral content below 15%, typically 3% to 5% of the more common black mica, hornblende. Deputy minerals are zircon, allanite stone, apatite, monazite etc.. When the granite stone in the plagioclase increase in the number, the gradual transition from granite or quartz diorite diorite; When the number reduced quartz and alkali feldspar maintain the same volume, the transition syenite.Rock was fine, tablets, and coarse granular structure, or like macular structure, the general shape of the dark minerals better times feldspar, quartz level since bad shape．On a more macular structure diagenesis (average 2.7g/cm3), porosity is generally 0.3% to 0.7%, for the general water absorption from 0.15%to0.46%. Compressive strength in about 200MPa, fine granite up to 300MPa more general anti-bending strength of 10 to 30 Mpa．Cold tolerance of granite, a shortage of high rate; Plates can be good together; Color rate of less than 20%, generally about 10% short of a uniform color and beautiful color matched based. Granite joints often of development, if the joint exploitation of space, not only harmless but also to shape the rules of stone mining.

    Often granite rock foundation, rock strains of rock and other forms of output, and the regional tectonic control, the general scale than the larger, broader distribution. In China, in addition to distribution of granite stone deposits in the fold belt, shield and continental platform crystalline basement areas, but also large Mesozoic appeared in the country's eastern region, Yanshanian continental platform activation of the vast region. Shandong, Guangdong, Fujian, Jiangxi, Zhejiang Province is famous granite origin. China Granite can be made of countertop, tombstone, blind stone, Sculpture, roadside stone, ect. Granite products.

Diorite neutral deep diagenesis representatives rock, granite stone is in one of the main rock types. Its chemical composition between acidic and basic rocks between silica content of 52% to 65%, FeO, Fe2O3, the MgO about 3% to 5% Al2O3 about 16% to 17%, 3% Na2O, K2O 2%.By the major mineral components of plagioclase feldspar and one or more of the dark mineral composition．

    Diorite color is a deep rock, and more faded black, with dark green spots of gray or light green color rate of 20% to 35%.　 When the dark and chlorite alteration minerals because of defibrillators blinking petrochemical, rock shows different degrees of green hue, as a more decorative stone beauty. Diorite physical characteristics are: Compression Strength 130 ~ 200MPa (dry) or 100 to 160MPa (wet), flexural strength of 10 ~ 25MPa, the bulk density 2.85 ~ 3.00g/cm3, water absorption of 0.4%.　

    Diorite often have a unique style to be used as external decorative stone. But the general diorite polishing more difficult, for the production of multi-level and the balcony floor.

    Rhyolite is the granitic magma emitted from the surface condensation formed by the regular structure of rhyolite named. Rhyolite was generally small volcanic rock and a vaulted dome of abortion, abortion was out of lava limited, and a large area of distribution, a mobile tectonic acidic volcanic rock, fusion is the main junction tuff, it was rock seats, and the vaulted dome rock wall outputs.