"Luna Pearl Granite" - porphyritic granite from the Late Paleozoic of Sardinia.
"Granite" in the decorative stone trade is any relatively hard rock that will take a fine polish, regardless of mineralogy or chemistry or geologic origin.
"Granites" turn out to be felsic to mafic intrusive igneous rocks (granite, granodiorite, porphyritic granite, rapakivi granite, orbicular granite, pegmatitic granite, graphic granite, anorthosite, monzonite, gabbro, norite, gabbronorite, dolerite, diabase, charnockite, etc.) and high-grade to very high-grade metamorphic rocks (metanorthosite, gneiss, metaconglomerate, amphibolite, quartzite, granulite, migmatite).
True granites (= monzogranites & syenogranites & porphyritic varieties) make up most of the commercial granite trade. Countless varieties are quarried around the world.
Luna Pearl Granite is a subporphyritic biotite leucogranite, derived from the Late Pennsylvanian-Early Permian Sardinian-Corsican Batholith (~280-310 million years). This rock has potassium feldspar, sodic plagioclase feldspar, quartz, amphibole, and biotite mica. The term “leucogranite” refers to especially pale or whitish-colored granites.
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