| Color | Dark brown to black |
| Texture | Resin-like consistency |
| Odor | Earthy and pungent |
| Taste | Bitter and slightly metallic |
| Solubility | Partially soluble in water |
| Melting Point | Approximately 80°C (176°F) |
| Density | 1.1 to 1.8 g/cm³ |
| pH Level | Neutral to slightly acidic |
| Ash Content | 1% to 10% |
| Moisture Content | Less than 10% |