Are the Ceylon sapphires in the iliana and raphsody range just heat treated or are they likely to be beryllium diffused just as has been discussed recently re various common treatments.I just wondered as I have a friend looking for an engagement ring at the moment and she would like a ceylon sapphire and I wondered if its labelled Ceylon does that mean only that it comes from Sri Lanka but that it can still have any number of treatments applied.I get the impression from the previous threads and Meeshoo's posts that even if bought in a high street shop a Ceylon sapphire may have treatments so probably her best bet is to buy a certified sapphire from a dealer?I wondered if anyone had bought from the TJC Iliana/Raphsody and spoke to them to confirm treatments re their more expensive range of sapphires.