## Common ground
All options are types of mortar and pestles differentiated by material.
## Options at a glance
**3924.10 – Plastic**
- **Defining trait:** Made from synthetic polymer, typically lightweight and non-porous.
- **Typical examples:** Kitchen grinders for spices, lab-use pestles.
- **Best fit when:** You need a low-cost, durable, easy-to-clean option resistant to chipping.
**4419 – Wood**
- **Defining trait:** Crafted from natural wood, often with a smooth finish and traditional feel.
- **Typical examples:** Herbal medicine grinding in apothecaries, artisanal spice grinders.
- **Best fit when:** You value natural materials, traditional use, or want a warm aesthetic.
**6802.99 – Stone**
- **Defining trait:** Made from hard, dense natural stone (e.g., granite, basalt), highly durable.
- **Typical examples:** Ancient spice grinders, high-end kitchen tools.
- **Best fit when:** You need maximum grinding efficiency and long-term durability.
**6909.19 – Ceramic**
- **Defining trait:** Made from fired clay, non-reactive and often glazed.
- **Typical examples:** Herbal medicine grinders, decorative kitchenware.
- **Best fit when:** You want a non-porous, chemically inert surface for sensitive ingredients.
**7323.9X – Iron or Steel**
- **Defining trait:** Made from metal, typically heavy and strong; may rust if uncoated.
- **Typical examples:** Industrial grinders, heavy-duty lab tools.
- **Best fit when:** You need extreme durability and resistance to impact.
## Key differences
| Material | Durability | Reactivity | Weight | Common Use Case |
|------------|------------|------------|------------|----------------------------|
| Plastic | Low | Low | Light | Casual kitchen use |
| Wood | Medium | Medium | Medium | Traditional/artisanal |
| Stone | High | Very low | Heavy | Long-term, high-effort use |
| Ceramic | Medium | Very low | Medium-heavy | Sensitive or medicinal |
| Metal | Very high | Medium-high| Very heavy | Industrial or lab settings |
## How to choose
- Is it lightweight and meant for everyday kitchen use? → 3924.10
- Does it feel natural, warm, and traditional? → 4419
- Is it very heavy and made of hard rock-like material? → 6802.99
- Is it glazed, non-porous, and used for herbs or medicine? → 6909.19
- Is it metallic, heavy, and built for tough tasks? → 7323.9X
## Overlaps & pitfalls
A mortar and pestle may combine materials (e.g., ceramic bowl with metal pestle), but the HS Code is based on the primary material. If unclear, prioritize the **main grinding surface** (e.g., stone or ceramic bowl). Avoid assuming "ceramic" means "glazed"—some are unglazed