Batman: WHat does it mean if you bought a diamond ring but the diamond doesn't have a certificate? (was a long time ago, say 1999, shop has closed since, was a reputable shop, sourced diamond from Antwerp but didn't give me a cert)
You can get the diamond checked and they'll give you a diamond report. They have little machines that measure all the parts of the diamond with lasers to calculate the exact dimensions. Might be handy for insurance purposes if you don't have a report.