My sister and I have inherited a ring which has two diamonds and an unusual design. I have always loved the ring and thought it was beautiful. We aren't sure who should have the ring and my sister suggested having a diamond from it each to make into a necklace to remember our family member. However I can't bring myself to ruin the ring and love it as it is. So I thought of maybe suggesting my sister have one of the diamonds to make into a necklace as she suggested, but that I keep the rest of the ring and then replace the missing diamond. But my question is, (finance aside), is it straightforward to replace a diamond in a ring or would I struggle to find a matching one? I would probably need to wait until I could afford it but wondered if it is an option? Thanks