It's available in small, thin white needles but they're easy to grind down and yes it does make an irritating powder that gets everywhere, so use masks, etc. It's well worth it though. I've used it in solid bubble bars as well and they're the best I've tried. I haven't tried them in bath bombs yet, so can't comment on those. IMHO, I think it really does make a difference to your skin. However, it still may be irritating to some. Edited to add: The usage rate is 1-15% but I've had products certified with 20-25% in them. Sarah.