This listing is for One or More Opals shown in the photos. Please refer to photos #4 thru #10 to see the official lineup for this listing. Please use the "Select Exact Opal" variation feature in order to pick the stone(s) of your choice. approximate weight of each opal is .5 carats and approximate dimensions are 7x5mm. These Australian Opals are 100% Natural with Zero Enhancements. They come from the famously favored location of Coober Pedy, Australia. They would make perfect little ring stones, or could be used in any jewelry or crystal art form. These are non-hydrophane opals, which means they have an extremely low water percentage. This is very good because this means their beauty will not diminish over time. These opal cabochons have not been placed in water at all, and they don't need to be! Greens and blues are most prominent. Each stone has similar weight and shape, but each one is visually unique. So please study the last 5 photos of this listing to get a good idea for which stones you would like to have. These fabulous crystal opals came directly from Australia to a jeweler who then allowed me to buy them. Please feel free to contact me with any questions you may have. Thanks for looking at my listing!