Black 50mm Round Coin opals

This is by far the largest stone we have ever made- perfect for creating a bold, dramatic accent that really catches the attention. The fire is amazing and the polish is mirror-like. Just like the small pieces in the series, they are flat & polished on both sides and rounded & polished along the edges. Like all of our black opals, these stones have an opaque black base with brilliant flashes of predominantly red fire and more subtle flashes of green and blue fire. You are going to love these opals!

Note about working with large coins: Don't blow up your big coin! The rules for successfully encasing a big coin are different from other opal stones you might work with. We're here if you need tips and advice for working with big coins.