My renter's insurance (Assurant, via Geico) told me that their personal articles addition will cover the value of the ring, but NOT the stones! The only other option I know of is Jeweler's Mutual, who have some bad reviews online from folks that made claims with them.
Anybody else got suggestions for good ring insurance? I go through Geico for my car and renter's insurance, but clearly that won't work for the ring since they don't include the stones.