Price listed is for 8 preset stones. These are Siam ruby acrylic faceted round rhinestones that are preset in silver cinch mount settings. The stone has a faceted top and back, and measures about 14mm. The setting measures about 18mm by 15mm, including the loop at the top. 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.