These are silver 925 stud earrings using 6mm Kyoto Opal (Tsuyukusa). They have a beautiful play of color, like natural opal, with a vibrant blue as the main color. Kyoto Opal is made using the same silica particles as natural opal, created by Kyocera's unique gem synthesis technology. Although it is not a natural stone, it offers a wider range of colors than natural opal and overcomes the fragility of natural opal, such as cracking and chipping. *Please refrain from discounts on handmade items. *For bulk purchases, you will receive a discount: 200 yen off the total for 2 items, 400 yen off the total for 3 items, and so on. This applies only to shipments to the same address. *We generally ship via Mercari delivery. If there are any issues, please contact us before leaving a review, and we will do our best to assist you. Please send us a message. Because natural stones are used, there may be natural scratches, dents, inclusions, and color variations. Also, the color of the same type of natural stone may vary slightly. As these are handmade, they are not perfect. There may be small scratches on the metal fittings or glue residue. Please handle them with care. Please refrain from purchasing if you are concerned about the above. Thank you for your understanding and cooperation in ensuring a smooth transaction. Thank you for reading to the end─