Some reading material for the current known gemstone enhancements/treatments available and their codes that identify the specific treatment/enhancement on certificates. Theres also a care guide to reduce any premature wear or damage. Note if theres a different treatment identified thats not on the list for the specific gem then thats a big red flag.
Feel free to add any other information that has been missed
http://www.palagems.com/enhancements/
Feel free to add any other information that has been missed
http://www.palagems.com/enhancements/