Ninth century ring was discovered in a Viking grave in Sweden . The ring, which is made of gold and silver, has been dated to the ninth century. Contains an inscription in ancient Arabic that says 'for Allah ' or 'to Allah ' Artefact adds weight to theory that Vikings traded with Islamic civilisations .
Ninth century ring was discovered in a Viking grave in Sweden . The stone is coloured glass , not amethyst , as previously thought . Contains an inscription in ancient Arabic that says 'for Allah ' or 'to Allah ' Artefact adds weight to theory that Vikings traded with Islamic civilisations .