Water-Worn Petrified Wood: Image Characteristics and an Introduction to Its Collectible and Ornamental Value

Water-worn petrified wood is a type of silicified wood. It refers to ancient trees that, after being buried underground, underwent silicification to form petrified wood, and were then carried and washed by rivers over a long period, with the weathered surface layer worn away, thus forming an ornamental stone with a dense texture and a rounded surface. It is mostly found in riverbeds, river beaches and the sand and gravel layers of ancient river channels, and it possesses both the scientific research value of a fossil and the ornamental value of a scholar's stone.

In appearance, the surface of water-worn petrified wood is smooth and fine, as if naturally polished, and the wood grain, growth rings and even bark structure are often clearly distinguishable. The colors are mostly gray, yellow, brown, red, black and so on, and some fine-textured pieces are warm and smooth like jade, which is why some people also classify them under the category of tree jade. Because the degree of water erosion differs, the stone bodies vary in form; some retain the complete outline of a tree trunk, while others are only rounded broken pieces.

According to the degree of erosion, water-worn petrified wood can roughly be divided into lightly water-worn, moderately water-worn and heavily water-worn. The more thorough the erosion, the rounder the surface tends to be, and the more prominent the expression of the grain. When selecting, one can focus on whether the grain is natural and continuous and whether the surface wear is even. Naturally water-worn stone bodies usually retain rougher traces in crevices and depressions, whereas artificially polished ones appear too uniform overall.

This type of fossil stone is suitable as a desk ornament, courtyard landscaping material or collectible, and can also be used for popular science displays. Daily care is relatively simple: avoid knocks and contact with acidic or alkaline substances, and regularly wipe off dust with a soft cloth. If dirt accumulates on the surface, simply rinse with clean water and let it dry; there is no need to apply oil or wax to maintain its natural, rustic texture.