PLEASE NOTE: This batch of cabs, is a one-time special batch from one of our lapidary contacts. They're priced differently than our regular labradorite cabs, and are extra flashy and amazing! This particular cabochon has a slightly domed back, it is NOT flat. It won't affect wire wrapping or clay work, but if you intend to set this into metalwork, you may need to use a step to get it to sit right. The dome height measurement DOES include the dome on the back.