I've been purchasing beads online that are described as jade, usually smallish beads around 4 mm, faceted but not sharply faceted, and coming in all colors ranging from pale purple to bright yellow. Sometimes they're described as chalcedony or quartz. I'm not too picky, if they really are stone and probably heat-treated or dyed, but now I'm really curious if they're really stone? And if they are really stoned, what kind of stone can be so easily dyed so many different colors?

When I get home I will post a picture in the comments. But I'd love to hear thoughts from the experts on what the heck these beads really are?