Each grain is irregular and porous which makes this gravel great for bonsai root system.

It is light weight.

Volcanic rock is important for bonsai mix and succulents because of its draining and moisture retaining capabilities, it permits you to use less compost.

This material specially used for bonsai, pre-bonsai and succulents.

This gravel does not contain any chemicals that can harm your plants.

For aquariums, cleaning of the volcanic rock is recommended.

This volcanic rock is already sifted.

Approximate grain size: from 1/4 inch to 3/8 inch