These are handmade earrings using sterling silver 925 (92.5% silver content) for all metal parts. They are said to be less likely to cause metal allergies, and can be worn immediately by those with allergies (however, they may not suit everyone depending on individual sensitivity). Color: Hateruma Blue Used Hotaru Glass: Heart-shaped *These Hotaru Glass are glow-in-the-dark, so they will glow in the dark for a while when exposed to strong light. *About Hotaru Glass A very popular souvenir item in Okinawa, Hotaru Glass, with its deep blue color reminiscent of the Okinawan sea, is a glass bead with a hole, made using a shaping technique called burner work, similar to tonbo-dama (glass beads). Artisans melt colored glass one by one and wrap it around an iron core, then layer silver foil onto the glass in a molten state like syrup, and use a special technique to express beautiful colors. There are no clear records of when Hotaru Glass, a type of tonbo-dama that originated outside of Okinawa, began to be popular as a souvenir in Okinawa, but it gained attention from the late 1980s as a replacement for rare coral products, and it is said that the colors reminiscent of the deep sea captured the hearts of tourists. ・The attachment part is an earring hook. ・The main selling point is that all the metal parts are sterling silver 925, so we cannot accept exchanges of the attachment part. ・These are handmade, so they are not perfect. Please purchase only if you understand this. ・The price and sale are for a set of 2, so we cannot sell them individually. ・If you purchase other items I am selling together, we can discount the shipping cost for the duplicated amount, but we do not offer discounts on single items. ・I do not smoke, and I do not have any pets.