That's the thing, once you get in the DMT loupe, you get these weird insights and observational skills and gnostic inputs. Of course getting lab grade shit will draw attention. So, you would need to look at the product you made. A friend of mine known as Root has done some really nice microscopic shots of the crystals. Even really clean looking DMT will capture impure yellow crystals as it settles out. I wouldn't use DMT I didn't make myself. I haven't used any for the last few years, but I have a stock of some bark.