The poem, which continues from one side to the other, describes the bottle itself and states that the bottle is "expensive as a whole city", which alludes to a well-known early story of a prime minister who gave an uncut jade (rock) to an emperor as a tribute. Nobody believed the jade was very good until it was cut open and found to be superb. The emperor thought it was more valuable than any city

For a discussion of this type of bottle see Hugh Moss, Chinese Snuff Bottles of the Silica or Quartz Group, p. 74

This bottle probably falls into 'Group D' category of agates and, like many of them, bears a Qianlong yuzhi mark