black stone flower
| Color | Black, with a slight purple tint | |
| Shape | Small, twisted, and curved | |
| Size | Approximately 1-2 cm in length | |
| Texture | Rough and slightly porous | |
| Odor | Strong, earthy, and pungent | |
| Taste | Bitter, slightly sweet, and aromatic | |
| Chemical composition | Contains coumarin, flavonoids, and volatile oils | |