A good friend of mine made good money turning glass bottles of various types into bongs. The best sellers were the marble soda bottles with unlicensed Hello Kitty labels, but Sanrio C&D'd him pretty fucking quick.
Otherwise, I can say for 100% certainty that the answer is absolutelynot pretty rocks wrapped up in wire, aka, "jewelry". Every lazy wannabe craft fair monarch is pumping out these low-effort bits of trash to the point that at least a third of the booths at any craft fair I go to is just stuffed to the gills with them.