Jewelry Note: Presidium Duo Tester II method DOES NOT distinguish between Real & Lab created stones. Just a quick note, Items are cleaned / sanitized using ozone treatment prior to shipping they may have light cleansing smell. Keep in mind that the majority of my listings consist of second-hand products. Therefore it is advisable to inquire about any details before making a purchase. I respond quickly to your questions feel free to make offers. "Always Be Kind to Each Other".