I have a chunk of crystal quartz the size of my face, i've got rose quartz the size of a toe and a pink quartz same size. What can i use them for?
the first time you dropped it on concrete or accidentally jammed it into a piece of steel it would most likely shatter into a zillion pieces. But, it could be done by someone with a lapidary wheel.
It is very possible. As long as there are no fractures or cracks. As pointed out on the previous answer, it would be fairly fragile though. I have seen rings made before in all different sizes, from ones for your fingers to ones that serve as napkin holders and even larger. To make one, you could slab the quartz, then cut those slabs into smaller squares (depending on the size of ring you want to make), cut off the sharp corners to make more of a circular shape, drill out the center, then grind down the corners into a circle and smooth the inside. Or you can get a bit to cut out a circle from the slab, drill the middle and repeat the same smoothing as in the first method. If you want to try it on your own, you'd need few pieces of equipment, which if you don't have already (rock saw, diamond drill bits, polishing wheel etc) would be kind of expensive and you'd probably be better off having someone else do it. If you want someone else to do it, contact a local rock shop or mineral club. Mineral/Rock and or Rockhounding clubs usually have the equipment. There even may be a lapidary club (rock cutting/polishing etc) near-by too, however they are usually part of the general rock clubs. If you found someone to do it, it shouldn't cost a ton, as it isn't really that difficult, just takes time (more so because quartz is so hard). cheers!