Object stones (Keisho-seki). Stones in this category resemble objects closely associated with nature, man made or natural.
Thatched-hut stones (Kuzuya-ishi) overhanging rounded or triangular roof
Animal-shaped stones (Dobutsu-seki) Any stone resembling an animal.
Bird-shaped stones (Torigata-ishi)
Insect-shaped stones
(Mushigata-ishi)
Fish-shaped stones
(Uogata-ishi)
Human-shaped stones
(Sugata-ishi)
Suiseki classifications By shape
House-shaped stones (Yagata-ishi) Various types of rustic houses.
Boat-shaped stones (Funagata-ishi)
Bridge-shaped stones
(Hashi-ishi)
Scenic Landscape stones, continued
Plateau stones (Dan-seki/Dan-ishi). Stones that suggest a landscape with a terraced hillside or a series of flat steps rising toward a cliff.

Island stones (Shimagata-ishi). Represent a  solitary island that emerges from the sea, normally displayed in a suiban with sand or water to enhance the island image.

Slope stones (Doha-seki/Doha-ishi). Suggest the rolling hills of a plain or a slope gently rising toward a hill.

Shore stones (Isogata-ishi). Suggest a rocky shoreline, washed by waves.

Reef stones (Araiso-ishi). Rough stones suggesting a jagged reef, usually very flat.

Sandbar stones (Hirasu/Hirasu-ishi). Smooth stones suggesting a sandbar or beach.

Coastal rock stones (Iwagata-ishi). Suggest a high, wind-swept rough offshore rock. White mineral deposits at base suggesting waves breaking against cliffs, are most prized.

Cave stones (Dokutsu-ishi). Hollows and cavities resemble caves, suggested by a deep dark cavity.

Shelter stones (Yadori-ishi). Suggest overhanging rocks that can give shelter from rain.

Tunnel stones (Domon-ishi). Tunnel or natural arch passing completely through stone.
Surface Pattern Stones
Yagata-ishi
Dan-ishi
Doha-seki
Iwagata-ishi
Yadori-ishi