These are ready-made heart-shaped London Blue Topaz earrings. Material: Pt900 Backing: Pt900 embedded type (If you do not need the embedded backing, we can offer a 1000 yen discount.) I purchased these ready-made earrings as a second pair during an Instagram Live. I cannot provide the warranty as it is signed, but I can provide it with the name portion cut off (please request this in the transaction comments). As these are stored at home, we strictly decline purchases from those seeking perfection or who are critical of evaluations. For shipping, to keep costs low, we will use Yu-Packet Post Mini envelopes and post them in a mailbox. If you are concerned, we can change to Kuroneko Compact for an additional 350 yen, so please comment before purchasing. m(_ _)m