Dragon Eye Faceting Diagram: Precision Gem Cutting Guide by A. Collins
The Dragon Eye is a captivating and unique 2-fold mirror-image symmetry faceting diagram created by designer A. Collins in July 2020. Specially designed for high Refractive Index (R.I.) stones like Ruby, this pattern creates a striking optical illusion resembling a dragon's eye.
1. Design Overview & Suitable Gem Materials
Optimized for a Refractive Index of 1.760, Dragon Eye is specifically designed for Ruby and Sapphire, but it also works exceptionally well for Quartz up to Cubic Zirconia (CZ).
2. Technical Design Specifications
- Design Name: Dragon Eye
- Designer: A. Collins (Jul 2020)
- Required Index Gear: 96 Index Gear
- Optimized Refractive Index (RI): 1.760 (Designed for Ruby, works for Quartz to CZ)
- Facet Count: 35 Facets + 12 Girdle Facets = 47 Total Facets
- Symmetry Type: 2-fold mirror-image symmetry
- Length-to-Width (L/W): 1.000
- Table-to-Width (T/W): 0.768
- U-to-Width (U/W): 0.138
- Pavilion Depth Ratio (P/W): 0.500
- Crown Height Ratio (C/W): 0.123
- Volume Ratio (Vol./W³): 0.231
3. Cutting Instructions & Angle Sequence
PAVILION CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| P1 | 45.00° | 96-08-16-24-32-40-48-56-64-72-80-88 | PCP |
| G1 | 90.00° | 96-08-16-24-32-40-48-56-64-72-80-88 | Set Size |
CROWN CUTTING SEQUENCE
| Facet | Angle | Index Settings (96 Index) | Instruction |
|---|---|---|---|
| C1 | 45.00° | 96-08-40-48-56-88 | Level Gridle |
| C2 | 20.00° | 17-31-65-79 | Level Gridle Meet G1C2 |
| C3 | 20.00° | 24-72 | Level Gridle Meet G1C3 |
| C4 | 18.50° | 20-28-68-76 | Meet G1C2C3 |
| C5 | 8.00° | 21-27-69-75 | Meet C1C2 Frosted |
| C6 | 7.00° | 24-72 | Float Optional - Do not meet both sides of C5. |
| T | 0.00° | Table | Meet C1C2 |
4. Practical Lapidary & Cutting Tips
- Ruby Optimization: Optimized for R.I. 1.760, making it an exceptional choice for ruby and high-index synthetic stones to capture the dramatic "dragon eye" optical effect.
- Crown Execution: Pay close attention when setting crown facets C5 and optional C6 to bring out the distinct eye-like center pattern.
Explore more precision faceting diagrams, custom gem designs, and lapidary guides on Horizon Gems!
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