This product is a lot of 3 20mm hematite donuts specifically designed for jewelry making. Hematite is a stone known for its iridescent quality and unique appearance, making it a popular choice for creating beautiful and eye-catching pieces of jewelry. With an approximate size of 20mm, these donuts are versatile and can be used in various jewelry-making projects such as bracelets, necklaces, and earrings. Ideal for crafters and jewelry enthusiasts looking to add a touch of elegance and sophistication to their creations. Very little, if any, magnetism. Size is approximate.