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1/19/2021 A Deep Dive Into the Properties of Quartzite-Use Natural Stone <br /> V.- <br /> On <br /> =On this example (Taj Mahal), the stone doesn't even look wet.This stone has low porosity. <br /> That's what we'd expect for a crystalline quartzite,which has been subjected to intense <br /> pressures and high temperatures that welded all the mineral grains together into one solid <br /> chunk. <br /> The fact that some quartzites are porous need not be a dealbreaker. But these stones <br /> need to be sealed,which will fill in the pores on the stone's surface. Be sure to thoroughly <br /> seal all worked edges of the stone, notjust the tops, and re-seal it from time to time. Even <br /> the best sealers may require multiple applications for full effectiveness on porous stones. <br /> On the positive side, modern sealers are very resilient and should last for many years <br /> under normal use. <br /> Summary <br /> This has been a detailed look at the nitty-gritty of quartzite, so if you've made it this far, <br /> congratulations! Here are a few points to hammer home. <br /> • Different stones form in different zones in the Earth's crust. The depth of burial and/or <br /> the type of mineral cement determine how porous a stone is. <br /> https:Husenaturaistone.org/properties-of-quartzite/ 13/16 <br />