Budaoweng has two kinds, one is hydrogrossular, the other is chalcedony-opal.
不倒翁有两种，一种为水钙铝榴石玉，另一种为玉髓蛋白石玉。
2
The study on massive hydrogrossular by means of polar microscope, infrared spectra and Xray shows that it consists mainly of hydrogrossular, with a little amount of diopside and calcite.