Debated. The bison ring is a real find, but ideas about who made it are still not sure.
The ring was found in a tomb at Dahwa, on the Al-Batinah plain in Oman. The settlement belongs to the Umm al-Nar culture, about 2600 to 2000 BC. The ring is silver, and its seal shows a bison like the pictures on Indus seals from the lands now called India and Pakistan. The tomb also held parts of necklaces, with beads and silver rings, plus pots made nearby and pots brought from elsewhere. One expert says this ring was likely made in Mesopotamia, in Iraq, from silver that came from Anatolia, in Turkey, for a person tied to trade with the Indus cities. The page says a bison picture had been found on stone seals before, but not before this on a metal ring.
People still argue about where the ring was made and who it was made for.
https://www.ancient-origins.net/news-history-archaeology/oman-prehistoric-silver-0017525