Big crystals are found only in Crash Twinsanity. They appear in the level Cavern Catastrophe. There are three colors; pink, yellow and green, each one bigger than the other. When 3 of them are hit in a row it will cause a rock slide, allowing Crash and Cortex to move on. When Crash and Cortex are chased by a giant drill at the end of Cavern Catastrophe the player needs to spin them to make rock slides come down and slow down the drill.