I received these from a jeweler acquaintance. I was told they are natural stones, such as turquoise, rose quartz, amethyst, and tiger's eye. Each stone is small, and some have necklace clasps attached from the processing stage. Each stone has a hole drilled in it, so I think you can make necklaces, bracelets, straps, and so on yourself. Please check the images for the size. I have no use for them, so I'm selling all seven types together.