This is a 6mm rounded square cut red andesine/labradorite ring. I call it that because that is how the gemstone was sold to me loose. I set the stones in the settings. This is a nice low setting, could even be a unique engagement ring. If you don't know about red andesine/labradorite I suggest you look it up. It is quite a fascinating gemstone. I believe this one has been heat treated. It is a size 5. I accept Paypal for payment. Please ask all questions before you buy. I offer combined shipping and a free layaway service.