Gerry - I use both as each has value in different circumstances. For example, I recently repaired a Malachite Trustone pen (one that someone else had made). It had a small chip that only the extra fine crushed malachite would fill. For filling gum pockets in Aussie burls, I find that the fine or medium crashed stone works better and gives a very atractive look. Please feel free to email me if you need more info.