Crystal Chemicals

Chemicals Used to Grow Crystals

Blue crystals of copper sulfate or copper sulphate.
Copper sulfate grows natural blue crystals. Anne Helmenstine

This is a table of common chemicals that produce nice crystals. The color and shape of the crystals are included. Many of these chemicals are available in your home. Other chemicals in this list are readily available online and are safe enough for growing crystals at home or in a school. Recipes and specific instructions are available for hyperlinked chemicals.

Table of Common Chemicals for Growing Crystals

Chemical NameColorShape
aluminum potassium sulfate
(potassium alum)
colorelesscubic
ammonium chloridecolorlesscubic
sodium borate
(borax)
colorlessmonoclinic
calcium chloridecolorlesshexagonal
sodium nitratecolorlesshexagonal
copper acetate
(cupric acetate)
greenmonoclinic
copper sulfate
(cupric sulfate)
bluetriclinic
iron sulfate
(ferrous sulfate)
pale blue-greenmonoclinic
potassium ferricyanideredmonoclinic
potassium iodidewhitecupric
potassium dichromateorange-redtriclinic
potassium chromium sulfate
(chrome alum)
deep purplecubic
potassium permanganatedark purplerhombic
sodium carbonate
(washing soda)
whiterhombic
sodium sulfate, anhydrouswhitemonoclinic
sodium thiosulfatecolorlessmonoclinic
cobalt chloridepurple-red 
ferric ammonium sulfate
(iron alum)
pale violetoctohedral
magnesium sulfate
epsom salt
colorlessmonoclinic (hydrate)
nickel sulfatepale greencubic (anhydrous)
tetragonal (hexahydrate)
rhombohedral (hexahydrate)
potassium chromateyellow 
potassium sodium tartrate
Rochelle salt
colorless to blue-whiteorthorhombic
sodium ferrocyanidelight yellowmonoclinic
sodium chloride
table salt
colorlesscubic
sucrose
table sugar
rock candy
colorlessmonoclinic
sodium bicarbonate
baking soda
  
silversilver 
bismuthrainbow over silver 
tinsilver 
monoammonium phosphatecolorlessquadratic prisms
sodium acetate
("hot ice")
colorlessmonoclinic
calcium copper acetatebluetetragonal