Karesansui, pebbles, specifications

Quick answer：

Karesansui, also known as dry landscape or Zen rock garden, is a form of Japanese rock garden that uses carefully placed stones, moss, and gravel to represent a natural landscape. The pebbles are used to represent water, and their specifications can vary based on the desired aesthetic and the scale of the garden. In karesansui, the pebbles are typically smoothed by natural elements and are selected for their size, shape, and texture to convey the essence of water ripples, waves, or the sea. The specifications for the pebbles include size, color, and arrangement, which are all critical to creating the desired visual effect.