Cabochon Dimensions:16mm Diameter Round Shape Cabochon is a gem or bead cut in convex form and highly polished but not faceted. Although the cut is simple, it can totally transform the look of a piece of rock, bringing out the magic of unique shapes and lines in the rock. Cabochons are used in ornamental jewelry, just like regular gems, and they are available in different shapes and sizes to suit all needs. The upper surface of a cabochon cut is gently curved, while the back is flat, allowing for easy working and setting. This natural crystal and gemstone round cab make DIY necklaces bracelets earrings pendants rings gifts or decoration with them. Besides, I hope the cabochon beads can bring buyer good luck, courage and happniess. The color of cabochon is random, you may get 2 sets of 10 colors if you order 2 units. Maybe 2 sets color are same or different. Color or size of cabochon may be a little different from the picture shown because of screen resolution, light or other factors. Natural crystal and gemstone has inner ice crack, ice cotton, black spot or other flaws, it is normal phenomenon.