Nebula Shimmer

Heptagon Cubic Zirconia · Optimized for RI 2.15 · 84 Index Gear

Cutting Diagram & Ray-Traced Optical Specifications

Target Material: Cubic Zirconia (CZ) & YAG/GGG Synthetics
Refractive Index & Critical Angle: RI 2.15 (27.7°)
Outline Shape: Heptagon
Facet & Tier Count: 49 facets · 7 tiers
Index Gear: 84 tooth index
Length / Width & Table: L/W 1.03 · Table 0.0%
Crown & Girdle Architecture: Standard · level girdle
Cutting Difficulty (FCI): Advanced (FCI 46.9 / 100)
ProFacet Optical Score: 0.988 (#144/630)
Brightness & Contrast: 1.045 / 0.983
Scintillation & Entropy: 1.036 / 0.989
Fire & Tilt Stability: 1.372 / 0.635

Nebula Shimmer is a heptagon meetpoint gemstone faceting diagram computationally optimized for Cubic Zirconia (CZ) & YAG/GGG Synthetics (Colored & white cubic zirconia (CZ), high-RI lab crystals) at RI 2.15 (critical angle 27.7°, Mohs hardness 8–8.5 Mohs). Cut on a 84-tooth index gear across 7 tiers and 49 total facets, it features a standard crown architecture with a 0.0% table area and a 1.03 length-to-width ratio.

Ranked #144 out of 630 heptagon patterns at RI 2.15, Nebula Shimmer achieves a composite ray-traced ProFacet optical score of 0.988 across a ±45° viewing tilt envelope—recording 1.045 normalized brightness, 0.983 structured contrast, 1.036 dynamic scintillation, and 0.989 reflection Shannon entropy with 1.372 spectral dispersion (fire). Under 100-run Monte Carlo ±1.0° mast-angle perturbation testing, 9 out of 10 simulated stones retain at least 98.6% of their nominal optical score (p10). Bench workload is rated Advanced (FCI 46.9 / 100). Instant download includes the printable PDF cutting instruction sheet (pavilion, girdle, and crown angles, index settings, cutting sequence, and meetpoint diagrams) plus the 3D FSL source file and workshop cutting license.