Nebula Shimmer

Truncated Cushion Trillion Quartz · Optimized for RI 1.54 · 96 Index Gear

Cutting Diagram & Ray-Traced Optical Specifications

Target Material: Quartz, Amethyst & Citrine
Refractive Index & Critical Angle: RI 1.54 (40.5°)
Outline Shape: Truncated Cushion Trillion
Facet & Tier Count: 49 facets · 11 tiers
Index Gear: 96 tooth index
Length / Width & Table: L/W 1.11 · Table 10.0%
Crown & Girdle Architecture: Standard · level girdle
Cutting Difficulty (FCI): Advanced (FCI 55.8 / 100)
ProFacet Optical Score: 0.831 (#32/37)
Brightness & Contrast: 0.901 / 0.871
Scintillation & Entropy: 0.339 / 0.892
Fire & Tilt Stability: 0.501 / 0.384

Nebula Shimmer is a truncated cushion trillion meetpoint gemstone faceting diagram computationally optimized for Quartz, Amethyst & Citrine (Amethyst, citrine, ametrine, smoky quartz, rose quartz, rock crystal) at RI 1.54 (critical angle 40.5°, Mohs hardness 7 Mohs). Cut on a 96-tooth index gear across 11 tiers and 49 total facets, it features a standard crown architecture with a 10.0% table area and a 1.11 length-to-width ratio.

Ranked #32 out of 37 truncated cushion trillion patterns at RI 1.54, Nebula Shimmer achieves a composite ray-traced ProFacet optical score of 0.831 across a ±45° viewing tilt envelope—recording 0.901 normalized brightness, 0.871 structured contrast, 0.339 dynamic scintillation, and 0.892 reflection Shannon entropy with 0.501 spectral dispersion (fire). Under 100-run Monte Carlo ±1.0° mast-angle perturbation testing, 9 out of 10 simulated stones retain at least 99.0% of their nominal optical score (p10). Bench workload is rated Advanced (FCI 55.8 / 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.