This is not a glow-in-the-dark type. I purchased this in Okinawa before. It's a teardrop-shaped hotaru glass. It can also be used as a pendant head. The chain is made of silver and has scratches and rust. The size is measured by a layman, so it may differ from the actual size. The color may appear different from the actual product depending on the lighting during photography and the monitor you are using. This is a used accessory. Please refrain from purchasing if you are sensitive to such things.