What you see is the very beautiful gem stone with the smooth surface and good luster.You can find that the size of the semi-finished gemstones is 30 mm, which is the good size for your to design your idea necklaces,the length for the strand is 18inches .You can purchase this gemstone to make all kinds of necklaces, bracelets, earrings and can also do other accessories distribution models.After all,we jyxpearl company offering is always the best, you will be right to choose our products.