Price listed is for 8 preset stones. These are purple faceted acrylic rhinestones preset in silver cinch mount settings. The rhinestone has a faceted top and back, and measures about 12mm. The setting measures about 18mm by 12mm, including the loops at the top and bottom. You should be able to open the setting and replace the stone should you want to. However, the setting was not meant to be opened and closed multiple times and doing so may result in damage to the setting.