The material composition of gravel can vary. Shirakawasuna is a Japanese term for a granite that consists of granite, quartz, black mica and white feldspar. This is also called white river sand. Pea gravel is another option. A variety of small stones, pebbles, crushed rock and riverside cobbles can all be part of the composition of a Japanese garden gravel.
Gravel should be a subdued color to complement the quiet elegance of the Japanese garden. Black and brown are two neutral options. White is a common color for a Japanese garden, but white gravel can reflect harshly when the sun hits. A combination of the colors or a salt and pepper look is another aesthetically pleasing option.
The size of the various rocks and materials that form gravel can vary in size. For example, cobbles may be 15 cm to 30 cm in diameter, while white river sand varies from 2 mm to 2 cm in size. Select the size that you want for the majority of your gravel and try to keep the size uniform.
The consistency of your Japanese garden gravel is extremely important. Symbolism is an integral part of the Zen-Buddhist movement and is a part of every Japanese garden. The gravel symbolizes water and it is raked to give it the look of waves. It can be raked in meticulous, straight lines in a uniform pattern. Another option is to create rounded swirls in the gravel for the wave effect. The gravel must be fine and conducive to raking to form a Japanese garden.