Tristano Faceting Diagram: Precision Gem Cutting Guide by Marco Voltolini
The Tristano is a brilliant 3-fold mirror-image symmetry trillion faceting diagram created by renowned gem artist Marco Voltolini. Designed for a standard 96-index gear, this design offers exceptional light return, making soft curved-trillion stones come alive with sparkle.
1. Design Overview & Suitable Gem Materials
Calculated for a Refractive Index of 1.540, Tristano can be cut in Quartz family gems (Amethyst, Citrine, Ametrine), but as noted by the designer, it delivers significantly higher brilliance when cut in higher RI gem materials like Topaz, Tourmaline, Beryl, Spinel, Sapphire, and Garnet.
2. Technical Design Specifications
- Design Name: Tristano
- Designer: Marco Voltolini
- Required Index Gear: 96 Index Gear
- Optimized Refractive Index (RI): 1.540 (Quartz & higher RIs)
- Facet Count: 58 Facets + 15 Girdle Facets = 73 Total Facets
- Symmetry Type: 3-fold, mirror-image symmetry
- Length-to-Width (L/W): 1.026
- Table-to-Width (T/W): 0.622
- U-to-Width (U/W): 0.539
- Pavilion Depth Ratio (P/W): 0.456
- Crown Height Ratio (C/W): 0.145
- Volume Ratio (Vol./W³): 0.215
3. Cutting Instructions & Angle Sequence
PAVILION CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| 1 | 41.50° | 10-22-42-54-74-86 | Set CTP |
| 2 | 45.88° | 03-29-35-61-67-93 | to CTP |
| 3 | 46.92° | 96-32-64 | to CTP |
| 4 | 90.00° | 96-32-64 | Set stone size |
| 5 | 90.00° | 03-29-35-61-67-93 | level girdle |
| 6 | 90.00° | 10-22-42-54-74-86 | level girdle |
| 7 | 43.50° | 05-27-37-59-69-91 | Meet girdle, new CTP |
CROWN CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| A | 48.60° | 96-32-64 | Set girdle thickness |
| B | 47.56° | 03-29-35-61-67-93 | Level girdle |
| C | 43.18° | 10-22-42-54-74-86 | Level girdle |
| D | 43.78° | 02-30-34-62-66-94 | Meet girdle, A, B |
| E | 35.00° | 96-32-64 | Meet A, D |
| F | 30.00° | 16-48-80 | Meet girdle, C |
| G | 21.15° | 13-19-45-51-77-83 | Meet B, C, D, F |
| H | 13.95° | 16-48-80 | Meet D, E, F, G |
| I | 0.00° | Table | Meet D, E, G, H |
4. Practical Lapidary & Cutting Tips
- Pavilion Centerpoint: Facet 7 creates a new CTP after establishing the girdle line, so make sure to cut carefully to form a clean point without over-cutting.
- Girdle Leveling: Level the girdle line carefully across facets 4, 5, and 6 to ensure uniform crown placement.
- Crown Meets: Pay close attention to Facet G (21.15°), as it joins four different facets (B, C, D, F) at a critical meetpoint.
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