Material：Black Onyx, Natural Semi-Precious Gemstone Size: 6mm in diameter, 38cm(15 inches) in length, about 61 pieces Energy: Each natural stone has its own unique element and chakra, which can protect the owner and give support to the wearer WIDE USAGE: Beads are excellent for DIY bracelets, necklaces, earrings and decorations.Best Special Jewelry Design Gift to your closest and most treasured people. NOTE: Each and every specimen is unique and you will receive ones similar to the image shown. Kindly Note: 1.Since the size above is measured by hand, the size of the actual item you received could be slight different from the size above. 2.Due to lighting effects, monitor's brightness/contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item.