| Property | Specification |
| Shape | Oval or oblong |
| Color | Mottled appearance with brown, black, or gray patterns |
| Size | 8–18 mm in length, 6–10 mm in width |
| Surface Texture | Smooth and glossy |
| Weight (per bean) | 0.2–0.5 grams |
| Moisture Content | 8–10% (for storage) |
| Hardness | Hard and firm |
| Odor | Mild, nutty aroma |
| Taste | Not applicable (toxic if ingested raw) |
| Shell | Thin but hard, brittle when dried |
| Kernel | Whitish and oily inside |