In my many years as an herbalist, I believe you just shed some light on this whole insanity.
No that has seen these "stones" ever reported that they had them analyzed by a certified Diagnostic Lab.
I've panned for gold in the past. How disappointing it is when you worked so hard for some gold-dust only to have it analyzed and identified as 'fools gold'. Some people go into denial and won't admit to themselves that they were wrong. Others are relieved to learn the truth so they can proceed after having learned a hard lesson.