This item is one of a kind and you will receive the exact piece(s) pictured. Macro photography is used to show detail but can make items appear larger than their actual size. Please refer to the size ranges and note whether they are in inches or centimeters. 1 inch 2.54 centimeters. Gems and crystals are great for altars, grids, terrariums, pocket stones, gifts, home decorating, collecting and more they are also wonderful additions to meditation, reiki and chakra work.Healing crystals are not a replacement for traditional medical treatment. Thank you for supporting our small business. This item is made of opal.