Granite yog ib yam ntawm lava los ntawm volcanic eruption thiab nws yog ib tug tectonic pob zeb uas nce mus rau saum npoo ntawm lub ntiaj teb' s crust nyob rau hauv lub siab heev nyob rau hauv lub siab heev. Raws li qhov saum npoo ntawm lub ntiaj teb' lub crust yog tsim, nws maj mam txav thiab txias. Nws belongs rau ib hom igneous pob zeb. Igneous pob zeb yog ib yam khoom tsim los ntawm kev txias thiab solidifying magma los yog lava uas muaj silicate (Silicate) yaj. Thaum molten magma yog condensed thiab consolidated, minerals yog tsim nyob rau hauv igneous pob zeb, xws li olivine thiab pyroxene. Lub densest hlau-magnesium silicate minerals yog tsim thaum lub magma kub yog lub siab tshaj plaws; cov minerals tsawg tsawg, xws li feldspar thiab quartz, yog tsim nyob rau hauv cov theem tom ntej ntawm txias. Cov zaub mov tsim hauv lava feem ntau tuaj yeem loj hlob tsis muaj kev txwv thiab muaj cov ntaub ntawv siv lead ua zoo.
Raws li lub hardness ntawm granite yog thib ob tsuas yog pob zeb diamonds, nws yog qhov ruaj khov thiab pom tseeb yog cov khoom siv zoo tshaj plaws rau kev tsim cov vuas phab ntsa thiab cov vuas hauv pem teb. Vim tias granite tsis tshua muaj ntau dua li ceramics lossis lwm yam khoom siv los ntawm tus txiv neej, nteg granite pem teb tuaj yeem ua rau tus nqi ntawm cov khoom loj. Granite muaj ntau yam thiab xim, uas tuaj yeem muab cov neeg siv khoom ntau yam kev xaiv. Granite countertops yooj yim los tswj thiab muaj peev xwm tiv thaiv fouling. Zuag qhia tag nrho, granite pem teb vuas muab cov neeg siv nrog ib qho kev ruaj khov thiab yooj yim-rau-kawg nto. Tsis tas li ntawd, tsis zoo li cov khoom siv hluavtaws, ntuj granite countertops muaj qhov kub thiab txias tsis kam, yog li lawv yog qhov zoo tshaj plaws rau txhua yam ntawm cov phaj ua. Ntuj pob zeb Amerianco pob zeb, marble qhov cub, marble.
Ib tug tob acidic igneous pob zeb belongs rau magmatic pob zeb. Feem ntau hu ua granite. Cov ntsiab lus silica yog ntau tshaj 70%. Loj heev yam tsis muaj txaj, granite inlaid qauv, feem ntau weathered nyob rau hauv ib tug spherical duab. Cov xim yog sib dua, nrog cov nqaij dawb thiab liab yog ntau dua. Nws yog tsim los ntawm cov zaub mov tsaus xws li quartz (hardness 7), feldspar (hardness 6) thiab ib qho me me ntawm biotite (hardness 2-4). Quartz ntsiab lus yog 20% -40%, alkaline feldspar yog ntau tshaj plagioclase, accounting rau ntau tshaj 2/3 ntawm tag nrho cov feldspar. Alkaline feldspar yog ntau hom poov tshuaj feldspar thiab albite, thiab plagioclase feem ntau yog albite lossis albite. Cov zaub mov tsaus yog feem ntau biotite nrog me me ntawm hornblende. Nrog granite qauv lossis porphyritic qauv.
