This beauty is made of silver and is also available in a mixture of white gold and yellow gold. I made silver ring and the blob was attached so that the fingerprints remain visible. It would be a really nice wedding band with your partners prints in the blob. The grey is an oxidisation caused by sulphur and it will slowly wear off although it can be replaced. The price here is for the silver ring but contact me if you want a quote for the same ring in gold (or golds).