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Onyx Ember 122
Heptagon Quartz, Amethyst & Citrine Faceting Diagram · Optimized for RI 1.54 · 84 Index Gear
Cutting Diagram & Optical Specifications
- Target Material
- Quartz, Amethyst & Citrine
- Refractive Index
- RI 1.54 (Critical Angle 40.5°)
- Cut Shape
- Heptagon
- Facet & Tier Count
- 56 facets · 6 tiers
- Index Gear
- 84 index
- Length / Width Ratio
- 1.03
- Optical Optimization Score
- 0.803
- Brightness & Contrast
- 0.89 / 0.80
- Deliverable
- Instant Printable PDF Cutting Instructions
Onyx Ember 122 is a meetpoint gemstone faceting pattern computationally optimized for Quartz, Amethyst & Citrine (RI 1.54) on a 84-tooth index gear. Download includes complete tier-by-tier pavilion, girdle, and crown cutting angles, index numbers, and meetpoint diagrams.