It is characteristic for the coin hoards usually found in Sweden, btw. It is almost always Arabic silver coins, since these seem to have been used widely for trade and Sweden didn’t mint their own coins until much later. I just read about a huge hoard of gold coins found in England — such things are unheard of here. Sometimes a few gold coins are unearthed but about 99% of hoards is silver. And those Arabic coins are kind of bland.