I keep ordering these stainless steel core blanks, they are awesome. Perfect for my inlay rings.
6mm Black Zirconia Ceramic Ring Core Blank Channel for Inlay
I have previously purchased this item from Opal & Findings. It is excellent.
But, unfortunately, it was the stainless steel version that was shipped by mistake — possibly mispackaged by the manufacturer.
Was easy to work with and made very well
Very well made ring!