Key Characteristics of Natural Landscape Raw Stones

Acoustic Quality (Tone)

High-quality viewing stones produce a pleasing sound when struck with a hard rod. This characteristic is not unique to Lingbi stones; it can also be discerned when comparing stones of the same variety. For instance, regarding Ying stones, the Song Dynasty scholar Lu You wrote in his *Notes from the Old Learning Hermitage* (*Laoxue'an Biji*): "The finest specimens possess a texture that is warm, lustrous, and deep green, emitting a sound like metal or jade when struck... whereas those that are dull and withered in color-sounding like striking rotten wood-are of inferior quality."

 

Texture and Patterning

This refers to the surface markings of the viewing stone. For pictorial stones, the aesthetic appeal and enduring visual interest of the patterns are the primary criteria for evaluation. For other types of viewing stones, the harmonious arrangement of surface patterns is also crucial. Rock patterns are primarily formed during the rock's genesis or through infiltration by mineral-rich fluids. Secondary patterns arise from subsequent weathering processes. Take, for example, the Red River stone from Guangxi: the parent rock is a light-gray fine-grained sandstone that, after fracturing, was permeated and cemented by red iron oxide; weathering turned the base color to an earthy yellow, creating a distinctive appearance of red patterns against a yellow background. Additionally, the intrusion of fine calcite or quartz veins into the rock can create white streaks; the "waterfall" features found in natural landscape stones are formed in precisely this manner.