The example shown here is a type of agate angel called Pink lace. There are many diffrent colours based on agate colours so make sure you do your colour research before making this oc! Here are some colour examples: imgflip.com/i/6sps73
Btw! If you already made an onyx angel oc or if you are going to, I made this extra thing so you can write in the comments on which chamber your oc belongs in! imgflip.com/i/6spsjk