In this video, I have come across several types of man made turquoise which are more or less untestable via the traditional methods (hot needle and acetone dye test). This is a follow up to my other two turquoise testing videos here: https://youtu.be/hMpnNm0azYg And here: https://youtu.be/VJf6ibYIiTg I also answer some of your questions about which liquids can also be used to test for dye. Chapters: 00:00 Testing new stones for dye 04:46 Testing stones with the hot needle 10:36 Testing using new liquids 14:16 Summery and Speculation