A powerful protection stone, Black Onyx absorbs and transforms negative energy, and helps to prevent the drain of personal energy. Black Onyx aids the development of emotional and physical strength and stamina, especially when support is needed during times of stress, confusion or grief. Material & Shape: Frosted and Round Grade A Genuine Semi-Precious Gemstone Beads Size & Amount: 4mm (Approximately 93~100pcs Beads Each Strand), 6mm (Approximately 62~67pcs Beads Each Strand), 8mm (Approximately 46~50pcs Beads Each Strand), 10mm (Approximately 37~40pcs Beads Each Strand). The hole size in these gemstones is about .92mm - 1.03mm depending on the size of the beads. For most round beads between the size of 4mm – 8mm has a bead hole around .92mm and then 10mm and beyond has a bead hole around 1.03mm. Return Policy: We have a 30 days satisfaction guarantee and if not completely satisfied with the product, we will gladly allow any returns with no questions asked. Feel free to ask any questions if needed and we'll reply back in a promptly manner. Return Policy: We have a 30 days satisfaction guarantee and if not completely satisfied with the product, we will gladly allow any returns with no questions asked. Feel free to ask any questions if needed and we'll reply back in a promptly manner. Get the best quality products at the most economical price Widely Usage Natural Stone Beads Great for jewelry making, necklaces, ankles, bracelets, earrings, rings, keychains, home & wedding decoration. Great ideal gift choice for Christmas, holiday present, birthday present and for jewelry making lovers.