A filler for paints and crafts use like a polishing compound or a mild scoring agent for metal and plastics.
Source of slow release calcium for garden and trees. Also known as agriculture lime best applied to acidic soil to amend to neutral pH. In vermiculture to neutralise acidic worm bed. Use also as grit for worms but better with 1000 mesh particle size. Added to chicken feed as calcium supplement for stronger eggs shells and bone structure.