We use 5A CZ stones, totally clean and transparent, an excellent alternative to VS diamond as it is more scratch-resistant for everyday wear.Unlike natural gemstones that are mined from the earth using large machinery, explosives, and unsafe working conditions, lab-created sapphire was developed to be more durable with better optical characteristics than of a diamond while maintaining an ethical standard to protect our environment. We also offer higher quality diamonds like VS/VSS diamond for custom jewelry. If you would like to know more, feel free to contact our customer service via Email: service@iceforall.com