by Luce » Feb 11, 2019 I love PS.....if it wasn’t for this site I wouldn’t be inspecting, dissecting, black lighting, measuring.....all my jewelry!!!! I have a small diamond that I bought a few years ago, estate. I have been curious about the cut as it is different from an MRB. It has more arrows than a traditional MRB....I thought it might be a Leo. I read that all Leo’s are laser inscribed so I checked out the girdle and it is inscribed but not with a SN traceable to Leo. Does anyone have an idea what lab the SN: LC18525 might belong to? I have attached a photo of the diamond!