African rosewood, also known as African black Dalbergia, has obvious heartwood, reddish brown purple or reddish brown, with deep purple stripes; Sapwood is white or fawn, slightly lignified; Air-dried density of wood: 0.9 ~ 1. 1.2g/cm3. The density is much larger than that of ordinary mahogany, and it is very heavy and can sink in water. It takes a hundred years for fennel to become a useful material. With the decrease of available resources, the value of collection and investment is getting higher and higher. African rosewood is a valuable hardwood at present.

African rosewood furniture is very durable and beautiful, not inferior to ordinary mahogany furniture. Although it has not been listed in the international redwood catalogue for the time being, its popularity and practicality in recent years have made it widely used, and its price is even higher than that of ordinary redwoods such as non-flowers, so the call for listing redwoods is extremely high. Compared with other hardwood furniture, there is more room for appreciation in the future.

Sour branches are called "mahogany" in the north and "old mahogany" in Jiangsu and Zhejiang, so almost all sour branch furniture is called mahogany furniture or old mahogany furniture except Guangdong. A lot of mahogany furniture in Qing Dynasty are sour branch furniture, that is, old mahogany furniture. Especially in the middle of Qing dynasty, it was not only large in quantity, but also good in wood and exquisite in production technology.