Join Date: Jul 2004
Location: Gadsden, Alabama
Speaking as a retired geologist - granite will be fine, but there are a lot of stones sold as granite! Fortunately, all that I am aware of share pretty much the same composition - quartz, one or more feldspars, mica, and a pyroxene or amphibole (dark minerals in linear crystals). You might want to check out a book from the library on minerals and see if those are the minerals you see in the rock. Syenite is also sold as granite - it is similar but lacks quartz and instead has nepheline or a similar mineral. Gabbro, diorite, monzonite, granodiorite - these are also members of th granite family.
There is often no relation between a rock's commercial name and its actual ID!