Diamgold Academy | In Partnership with Corlia Roberts Institute of Diamonds
Tender House: ____________________ Date: ____________________
Parcel ID / Stone No: ______________ Total Carats: ______________
1. Physical Characteristics (The Technical “Look”)
| Feature | Observation | Notes (Shape, Surface, Strain) |
| Morphology | [ ] Octahedron [ ] Macle [ ] Dodecahedron [ ] Other | |
| Color Grade | [ ] D-F (Collection) [ ] G-J (Commercial) [ ] K-M [ ] Fancy | |
| Clarity (Rough) | [ ] Clean [ ] Slight Pique [ ] Heavy Pique [ ] Rejection | |
| Fluorescence | [ ] None [ ] Faint [ ] Medium [ ] Strong |
2. Yield Projection (The “Polished” Math)
Estimate the largest possible polished stone(s) from this rough.
- Estimated Polished Weight: __________ ct
- Expected Polished Grade: Color: __________ Clarity: __________
- Secondary Stone(s) Yield: __________ ct
Formula Reminder: $Rough Weight \times Expected \% Yield = Polished Weight$
(Standard yield is calculated on our proven and secret formula.)
3. Valuation & Bidding Strategy
- Current Rapaport / Market Price (Polished): $ __________ per carat
- Total Polished Value (Estimated): $ __________
- Less Manufacturing Costs & Profit Margin: $ __________
- Maximum Purchase Price (Rough): $ __________
4. Expert Consultant Remarks (Diamgold Representative)
- Risk Factors: (e.g., Internal tension, feathers near girdle, color overtones)
- Recommended Action: [ ] Strong Buy [ ] Buy at Discount [ ] Pass
5. Final Bid Decision
- Final Bid Submitted (USD/ZAR): ____________________
- Bid Status: [ ] Accepted [ ] Rejected [ ] Pending