In 2016, jeweler Olivia Young of Ouroboros sold a red spinel ring for £6,000 ($7,700). Last year, the client’s insurance company paid out £30,000 ($38,400) to replace it. Experts say that this ...

Spinel is often given as a gift for a 22nd wedding anniversary. Sardonyx is a combination of the minerals sard and onyx, which together form the reddish-brown or orange stone with bands of white ...