These earrings are made with natural citrine. Citrine is also the birthstone for November. Screw-back earrings can be substituted for an additional 100 yen. While made with care, they do not have the same level of perfection or durability as mass-produced items. Please understand that these are handmade before purchasing. No smokers or pets. Will be shipped via Mercari mail in simple packaging. Thank you for viewing.