What's the noun for granitizing? Here's the word you're looking for.
granite
(petrology) A group of igneous and plutonicrocks composed primarily of feldspar and quartz. Usually contains one or more dark minerals, which may be mica, pyroxene, or amphibole. Granite is quarried for building stone, road gravel, decorative stone, and tombstones. Common colors are gray, white, pink, and yellow-brown.
(uncountable, figuratively)Toughness; the quality of having a thick skin or being rough.
“Thus, granites can form both by magmatism and granitization or a combination of the two.”
“The whole of this territory is, therefore, worth examination in the light of the granitization hypothesis.”
“The polyphasic character of these granitization processes have, in some cases, made basic rocks appear to be enclosed within granites like intrusive rocks.”