text: how are bismuth crystals made? what is the procedure for making large, colorful hopper crystals, and what materials and tools will i need? thank you for your advice :) this guy has a great page about it: http://www.theodoregray.com/periodictable/elements/083/index.s7.html  and it points to some kid's high school project about .. da da, bismuth crystal formation! http://www.theodoregray.com/periodictable/samples/083.x3/sciencefair2.html  hope this helps.