By John
| Factor | Impact on Value | What You Can Do |
| Diamond Quality | High | Obtain a professional valuation |
| Ring Condition | Medium to High | Have the ring professionally cleaned |
| Certification | High | Locate original diamond certificates |
| Designer Brand | High | Provide original packaging if available |
| Market Demand | Medium | Compare offers from multiple buyers |
| Selling Method | High | Use trusted specialists rather than quick-sale outlets |