Price listed is for 10 preset stones. These are black diamond acrylic faceted round rhinestones that are preset in silver cinch mount settings. The stone has a faceted top and back, and measures about 10mm. The setting measures about 16mm by 11mm, including the loops at the top and bottom. The inside of the loop measures about 1.3mm. You should be able to open the setting and replace the stone should you want to. However, the settings were not meant to be opened and closed again and again, and doing so may result in damage to the setting.