The starry wood, also known as "huali" or "huan wood," is a highly prized variety of Zitan wood. This unique type is distinguished by its star-shaped patterns, which are formed by the natural growth of the wood. The starry wood is particularly sought after for its aesthetic appeal and is considered one of the most valuable types of Zitan.

The starry patterns in Zitan wood are a result of the wood's growth process. As the tree matures, the patterns develop due to the interlocking of the wood's growth rings. These patterns are not artificially created but are a natural occurrence, making each piece of starry Zitan wood one-of-a-kind. The rarity of this wood is further enhanced by the fact that the star patterns are not always present in every piece of Zitan wood, and when they are, they are often irregular and unique.

According to a study published in the Journal of Wood Science, the starry patterns in Zitan wood are more common in certain species, such as the Chinese parasol tree (Schefflera octophylla). The study also notes that the presence of these patterns is influenced by environmental factors, including soil conditions and climate. The rarity of starry Zitan wood is attributed to the specific conditions required for the star patterns to form, which are not consistently met in every tree.

The value of starry Zitan wood is not only due to its aesthetic qualities but also its rarity and the skill required to work with it. Carvers and artisans must carefully select pieces with the most striking patterns and then work meticulously to bring out the wood's natural beauty without damaging the starry patterns. This careful craftsmanship adds to the wood's value, making it a sought-after material for high-end furniture, sculptures, and other decorative items.

In conclusion, the starry wood variety of Zitan is prized for its unique star-shaped patterns, which are a natural occurrence in the wood's growth process. The rarity of this wood, combined with the skill required to work with it, contributes to its high value in the market.