Granodiorite

The term banatite is sometimes used informally for various rocks ranging from granite to diorite, including granodiorite.

Biotite and amphiboles often in the form of hornblende are more abundant in granodiorite than in granite, giving it a more distinct two-toned or overall darker appearance.

Granodiorite is a plutonic igneous rock, formed by intrusion of silica-rich magma, which cools in batholiths or stocks below the Earth's surface.

Banatite is a term used informally for various rocks ranging from granite to diorite, but often granodiorite, that were intruded in the Late Cretaceous in the Banat and nearby regions of present-day Hungary and Serbia.

However, its presence in the Rosetta Stone implies that they had considerable experience with it and the fact that only newer artifacts are found may simply be because earlier pieces were lost.

Granodiorite is quarried in the Newry area of County Armagh with the common name of 'Newry granite'.