[[File:Coloured_crystalsColani.png|thumb|All 5 of the coloured crystalsgif]]Coloured Crystals are collected in a normal level to unlock the [[Crystal Door]] at the end, which usually contains a [[Crystal Door Challenges|challenge]] in which Croc must complete in order to get the final sixth [[Gobbo]] in the level. They are found in [http://croc.wikia.com/wiki/Smash_Boxes Smash Boxes], <span style="font-size:10pt;line-height:115%;font-family:Helvetica,sans-serif;">disguised </span>as regular crystals or just laying around. They can be used to unlock the [http://croc.wikia.com/wiki/Crystal_Door Crystal Door] by finding all 5 of the coloured crystals on a level. The crystals come in five colours: Red, Purple, Green, Blue, Yellow; and White (in order to camouflage coloured ones) which will change back into a coloured crystal once collected. The disquised crystals also add one regular crystal to your count. This may help when [http://croc.wikia.com/wiki/Croc Croc] is hurt (so he doesn't lose a[http://croc.wikia.com/wiki/Life life]) and helps to get the goal of 100 crystals which awards a life.
