by Seaglow » Nov 20, 2016 If you want to do a DBTY necklace, you'd save buying a lot made in a temporary necklace setting. I have a couple of these and I sent them to the lab. Because of the color it should come from the same mine/lot but the treatments are mixed. The lab report indicated unheated, heated (traditional, which is acceptable and common), and glass-filled. I am quite a purist and will take out a couple of glass-filled on one of the necklaces to do a DBTY myself, which funny I was also planning to do as this lot is perfect with a thinner cut yet sparkly and very transparent with good color, many included but very pretty with good color matching. Or better yet I could sort out all the unheated in one necklace but I only plan to use one necklace though. I was able to ask the lab which is which for each stone on one necklace, but unfortunately didn't for the other one (I had one necklace tested first) I asked an independent gemologist who studied Burmese sapphires and rubies as the lab-report went back with "mixed" results. I was expecting natural from my loupe identification, and heated on some, but not glass-filled, and he said borax is used both for traditional-hearing and glass-filled but he thinks they can be traditional heating and not really glass-filled (if there are experts/gemologists here, pls free to chime in). Here are photos. The rubies on the photos are with the first lab report.