Brand new Black Opal Band, Lab grow opal, 5mm wide 2mm thick. One of a kind and very beautiful. They are made of stone and can be broken with enough force. I have found that 2mm thick is at the best comfort level and very strong at the same time. I am an auto body mechanic and build custom cars and wear mine every day, it’s gotten scratched up some but still just as beautiful and just as strong as ever. I work in the yard with it and do everyday things without thinking twice about it. Again not saying it can’t be broken just example of some abuse it can take, as long as you’re not putting huge amounts of force on it one way or another you will be ok. Just throwing all that out there just because it is made of stone, I believe the hardness level of the black opal is around 4. These are custom made and ready to go no wait time. Thanks for looking and reading!