Yes, you have to change it at the previous place, bring your certificate, invoice and ring tag, and things will be OK. Actually, it's not that much trouble If you wash them with toothpaste, they will glow. If not, go to the jewelry processing shop to wash it. Remember, look for someone with an ultrasonic cleaner. (PT950, D0057CT, what do you mean?) It's platinum 950 color. This diamond weighs 0.057 carats.