What small stones retain moisture for a long time

Because there is a large gap between the big stones.

Matter in nature has the property of maintaining a minimum energy state, and (water molecules) are grouped together in order to reduce the surface tension between molecules. In order to reduce the surface tension, the water will minimize its volume and eventually aggregate into droplets that expose the surface. The surface area of the sphere is the largest for the same volume (if compared to a cube, other bodies can also be cut into cubes and cones).

It is conducive to contact with the outside air and the loss of moisture. In addition, there is a gap between the large stones, which is conducive to the wind blowing through and taking away the moisture.

There is a small gap between the pebbles.

There is both gravitational and repulsive force between molecules, and gravity acts when molecules are relatively close to each other (e.g., structures within an iron bar). Repulsion works when the molecules are far away from each other (e.g., the broken rods are separated from each other because the gap between the separated molecules is too large). Water is fluid, and water molecules and external molecules can come into close contact with each other.

The gap between the pebbles is small, and the water molecules are distributed in it, and there is a certain gravitational effect between the pebbles. Moreover, the external conditions have little impact on the internal environment of the stone, so it is easier to fix the water.

It may not be comprehensive, you can look for it

Volcanic stone retains water for a long time, and now the cultivation of orchids uses more media, generally for Japan, and is sold in the market, and is now directly called orchid stone.

First it turns into dirt, then it turns into sand.

The stock price will turn into dust, dust to dust, dust to dust, and nothing can resist the baptism of time.

All the matter and objects in the world are changing, moving, and the same is true for stones. Some stones get smaller and smaller as they grind in the water, and some grow bigger and bigger.

It depends on what kind of stone it is, and if it's a lime stone, it's likely to grow, for example, a stalactite, and it's just growing every year, because new calcium carbonate is constantly deposited on it.

Yes....You might even blow up your big brother...

Is it all boredom?

It is best to wash the small stones picked up at the beach with fresh water, so that they will not be corroded by salt and will be stored for a longer time.

You don't need to soak in water, you just need to brush the stone with a brush and water, and dry it. . .

Yes, the stone will not deteriorate, and it will not break no matter how you store it.

If you don't soak in the water, it will change color, and then it won't look good, so soak it.

The water stone, also known as the water absorption stone. The stone has strong water performance, and after the water is stored in the basin, it can be sucked to the top in an instant. Wild grasses and moss can be planted on the stone, which is verdant and lush, and is a good stone for making bonsai.

Sand stones, crisp and brittle, but very absorbent; The hardness of limestone is slightly higher, and the structure is finer than that of sandstone. The stone is easy to shape, because it is brittle and brittle, you can chisel grooves, drill holes, and carve the ideal image in your heart.

It becomes a good environment for weeds to grow.