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Rosa Dome Faceting Diagram: Precision Gem Cutting Guide by Marco Voltolini
The Rosa Dome is a stunning 6-fold radial symmetry faceting diagram created by master designer Marco Voltolini. Optimized for a standard 96-index gear, this cut works exceptionally well for Quartz and higher Refractive Index (R.I.) gem materials to maximize brilliance and light return.
1. Design Overview & Suitable Gem Materials
Calculated for a baseline Refractive Index of 1.540, Rosa Dome is ideal for cutting Quartz family minerals (such as Amethyst, Citrine, and Smoky Quartz) as well as higher R.I. stones. Its unique hexagonal radial pattern creates an eye-catching scintillation.
2. Technical Design Specifications
- Design Name: Rosa Dome
- Designer: Marco Voltolini
- Required Index Gear: 96 Index Gear
- Optimized Refractive Index (RI): 1.540 (Quartz and higher)
- Facet Count: 61 Facets + 6 Girdle Facets = 67 Total Facets
- Symmetry Type: 6-fold radial symmetry
- Length-to-Width (L/W): 1.155
- Table-to-Width (T/W): 0.264
- U-to-Width (U/W): 0.264
- Pavilion Depth Ratio (P/W): 0.475
- Crown Height Ratio (C/W): 0.272
- Volume Ratio (Vol./W³): 0.309
3. Cutting Instructions & Angle Sequence
PAVILION CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| 1 | 46.98° | 96-16-32-48-64-80 | Centerpoint (temporary) |
| 2 | 90.00° | 96-16-32-48-64-80 | Set size |
| 3 | 41.00° | 03-13-19-29-35-45-51-61-67-77-83-93 | New centerpoint |
| 4 | 41.96° | 96-16-32-48-64-80 | Centerpoint |
CROWN CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| A | 55.00° | 96-16-32-48-64-80 | Set girdle thickness |
| B | 42.27° | 03-13-19-29-35-45-51-61-67-77-83-93 | Meet girdle |
| C | 31.53° | 15-31-47-63-79-95 | Meet A, B |
| D | 18.50° | 02-18-34-50-66-82 | Meet B, C |
| E | 14.79° | 04-20-36-52-68-84 | Meet D, E |
| F | 0.00° | Table | Table, meet D, E |
4. Practical Lapidary & Cutting Tips
- Radial Symmetry: Pay close attention to the 6-fold radial symmetry steps when cutting pavilion facets 1, 3, and 4 to maintain proper alignment.
- Quartz Optimization: This design performs wonderfully for quartz materials, enhancing light dispersion across the 67 total facets.
- Crown Meets: Ensure clean meetpoints between facets C, D, and E prior to cutting the final table facet (F).
Explore more precision faceting diagrams, custom gem designs, and lapidary guides on Horizon Gems!
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