These are natural pyrite with quartz druzy freeform nugget beads. The beads on the strand are graduated measuring approximately 40x35mm at the center and 30x25m at the ends. They are temporarily strung and knotted in a 16" strand. These will make a superb piece of jewelry with your design or an addition to your collection. Color may vary slightly due to the color calibration of each individual monitor. Please convo with me if you need more of these. Thanks for shopping at my store!!!