GOSHIKI - Five-color SUISEKI stones (Traditionally a mixture of red, yellow, and green with either gray, blue, purple, white or black.)

Other CLASSIFICATIONs of suiseki by colour are :
Kuro-ishi Black stones
Maguro-ishi Jet-black stones
Aka-ishi Red stones
Ao-ishi Blue stones
Murasaki-ishi Purple stones
Ogon-seki Golden-yellow stones
Kinko-seki Yellow-red stones