What grade does Brunei black oil agarwood belong to?

Aquilaria sinensis belongs to high grade.

Brunei agarwood is produced in Brunei region of Southeast Asia and is the top grade of agarwood. Brunei agarwood is rich in oil, the black oil is transparent, the oil is rich and the fragrance is rich. It is a treasure in agarwood, which is rare and expensive.

Aquilaria sinensis is a traditional perfume used in China, Japanese, Indian, Southeast Asia, Middle East and other countries and regions. It is also an important and precious medicinal material widely used in China, which has been used for thousands of years in the world.