Material is Natural Agate,Raw Material Agate Origin is Brazil. This Agate Has a High Hardness. So It Can be Processed into a Very Regular Shape. And Can be Polished Very Bright and Smooth Hole Size:1mm, Fit for most Wires or Thread; Strand Length:15 inch Quality: Lead-free and Nickel-free, No Harmful Substances Beads are excellent for Beading, Necklaces, Bracelets, Earrings, Rings, Jewelry Design, DIY gifts, Arts & Craft, Yoga bracelets, Home & Wedding Decoration These beads will be the best gift sets choice on New Year's Day, Valentine's Day, Mothers' Day, Fathers' Day, Halloween, Thanksgiving Day, Christmas Day and Birthday