I don't know about you, but I find these clear quartz nuggets to be very intriguing. Natural quartz rock crystal is a very hard stone (Mohs hardness of 7.0) and has a very high refractive index, making these do interesting things to the light. The nuggets are topped with silvertone balls and hang from French wires that are lead and nickel-free. Each pair is well matched. The nuggets contain tiny inclusions. Also available in sterling silver.