Answer: it is granodiorite stele
Step-by-step explanation:
The Stone is a tablet of black rock called granodiorite and it stood some two (2) meters high. It is an Egyptian hieroglyphs: which is a script made up of small pictures that was used originally in ancient Egypt for religious texts. Since it was discovered, its kept in the museum to be protected. It contains 3 translation of the same decree. Although the knowledge of how to read hieroglyphs was lost, until the Rosetta Stone was rediscoverd again in 1799 that it helps people read this text.