Beautiful High Quality Glass Pebbles By Stoned®Shape: The curved, polished surface of glass pebbles causes fascinating light refractions. Incident light makes our glass pebbles sparkle and shine, they are thus best suited for applications with light.Detail: pebbles are flat backed and measure approximately 20mm in diameter.Garden Feature: These glass pebbles can be used in aquariums as decoration. We recommend washing them and soaking them thoroughly before use. Brush them with soap and rinse well. Let the stones dry before use. Use them in water features or ponds in your garden. Decorate walkways and scatter the stones under trees and flowers.Multiple Uses: As these gems are so beautiful, they can be used for weddings, birthday/engagement.