This is a white gold necklace featuring a K14 gold natural blue topaz and diamonds. The top is likely Pt900 (platinum 900). It's approximately 39 centimeters long. I purchased it last month at a department store for 39,800 yen. It's a beautiful item, worn only once. I'm selling it for less than half the purchase price. Don't miss this opportunity. It's perfect for a gift. Please note that this is a used item, so please understand that there may be some minor overlooked stains or scratches.