@happyandsingle
Just a word of warning. My nan left me a very fancy piece of jewellery in her will in the late 1990's ... (Think 24c gold, AND diamonds, and very good quality.) It was bought for £350 in 1973 (around £4,000 in today's money.)
Me and DH went through some troublesome times financially in the mid noughties, so I took the piece of jewellery to a place that bought and sold gold. They valued it at £400. I decided that wasn't enough for me to give it up.
We managed to get ourselves sorted, and a couple of years later we were financially sound again.
In 2011 (around 3 years after that 'valuation,') out of curiosity I went to an independent valuer (a friend of a colleague who was 100% genuine,) to see how much the value of the item was. He told me it was worth approximately £11,000 to £12,000. Just 3 years earlier, someone offered me £400.
Unbelievable! I would have been completely scammed.
So, as I say, be careful, because your nan's ring may be worth more than you're being offered. Get plenty of valuations.
(We still have this piece of jewellery by the way!!!)