Material：Black Rhodolite Sell Unit: 10 Pcs per unit Size: About 14mm in diameter 7mm in thickness, Hole size: about 5.5mm Lead-free and Nickel-free, No Harmful Substances Wide Application: Excellent for Jewelry Making/Design, Arts & Craft, Necklaces, Bracelets, Earrings, Ring, Home/Wedding Decoration, Key Chains. Natural stone beads are ideal present choices for Christmas, holiday, birthday, and for jewellery making DIY lovers.