Here is a 2.13Ct Natural Blue Spinel Gemstone. This is part of a collection of estate jewelry that will be auctioned this week. It is a deep and vibrant blue rectangular radiant mixed cut that will look fabulous in a custom ring with Diamonds around it. The Russian Royal Crown has a Red Spinel on top. If you are a pretty rock collector- you won't want to miss this gorgeous gem quality Spinel. I took it to the gem lab today and it was confirmed natural Spinel. This 2.13ct Blue Spinel will be auctioned to the highest bidder at $1 No Reserve.