| What to Check | Why It Matters | What You Can Do |
| Diamond quality | Influences the stone's value | Check available grading information |
| Carat weight | Larger diamonds can command different values | Review certification where available |
| Metal | Gold or platinum contributes to the overall value | Check hallmarks |
| Condition | Damage may affect resale appeal | Inspect settings and clasps |
| Documentation | Supports identification and assessment | Gather certificates and receipts |
| Buyer reputation | Helps you compare offers confidently | Research established buyers |
| Selling method | Affects convenience and process | Compare online and in-person options |