Scenic landscape stones (Sansui keijo-seki). Stones in this category suggest natural aspects of nature, Such as mountains, waterfalls or coastal rocks.
Near-view mountain stones (Kinzan-seki). Angular peaks with rough textures, suggest a mountain viewed from close range.

Distant mountain stones (Toyama-ishi) Soft outlines suggest a mountain or mountain chain  viewed from a great distance.

Single-peak stones (Koho-seki)

Double-peak stones (Soho-seki) Two mountains, or a single mountain with two peaks.

Triple-peak stones (Sampo-seki) Mountains with three individual peaks.

Mountain range stones (Rempo-seki) Range of mountains rather than a single mountain with one or more separate peaks.

Snow-covered mountain stone (Sekkei-ishi) Mountain stones with snow-like minerals on peaks
Waterfall stones (Taki-ishi) Resemble mountains with one or more waterfalls, represented by vertical strips of quartz or other bright minerals.
Thread-waterfall stones (Itodaki-ishi) Mountains with one or more thin waterfalls running down the front of the stone.

Sheet-waterfall stones (Nudodaki-ishi) Broader lines of light-colored material coming down the front of the stone.

Dry waterfall stones (Karedaki-ishi)  Groove or channels suggest a dried waterfall.

Mountain waterfall stones (Yamagata-taki-ishi) Mountain stones with one or more waterfalls appearing on their front surfaces.

Mountain-stream stones (Keiryu-seki) Stream running through a valley.
Suiseki classifications  By Shape
Waterpool stones (Mizutamari-ishi) Depressions that suggest mountain pools or ponds.
Pool or Lake stones (Tamari-ishi) Similar to waterpool stones - depressions suggest deeper pools or lakes.

Waterpuddle stones (Mitzutame-ishi) Similar to waterpool stones, shallow depressions that hold water.
Mountain stones (Yamagata-ishi). Resemble different forms of  mountains.
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Taki-ishi
Toyama-ishi
Kinzan-seki