Tidal Paraiba Tourbillon Rosette

Truncated Hexagon Topaz & Tourmaline · Optimized for RI 1.61 · 96 Index Gear

Cutting Diagram & Ray-Traced Optical Specifications

Target Material: Topaz & Tourmaline
Refractive Index & Critical Angle: RI 1.61 (38.4°)
Outline Shape: Truncated Hexagon
Facet & Tier Count: 61 facets · 8 tiers
Index Gear: 96 tooth index
Length / Width & Table: L/W 1.00 · Table 9.7%
Crown & Girdle Architecture: Frosted Intaglio · level girdle
Cutting Difficulty (FCI): Expert (FCI 62.3 / 100)
ProFacet Optical Score: 0.871 (#226/372)
Brightness & Contrast: 0.967 / 0.837
Scintillation & Entropy: 0.455 / 0.957
Fire & Tilt Stability: 0.375 / 0.469

Tidal Paraiba Tourbillon Rosette is a truncated hexagon meetpoint gemstone faceting diagram computationally optimized for Topaz & Tourmaline (Swiss & London blue topaz, imperial topaz, green & pink tourmaline, rubellite, indicolite) at RI 1.61 (critical angle 38.4°, Mohs hardness 7–8 Mohs). Cut on a 96-tooth index gear across 8 tiers and 61 total facets, it features a frosted intaglio crown architecture with a 9.7% table area and a 1.00 length-to-width ratio.

Ranked #226 out of 372 truncated hexagon patterns at RI 1.61, Tidal Paraiba Tourbillon Rosette achieves a composite ray-traced ProFacet optical score of 0.871 across a ±45° viewing tilt envelope—recording 0.967 normalized brightness, 0.837 structured contrast, 0.455 dynamic scintillation, and 0.957 reflection Shannon entropy with 0.375 spectral dispersion (fire). Under 100-run Monte Carlo ±1.0° mast-angle perturbation testing, 9 out of 10 simulated stones retain at least 98.2% of their nominal optical score (p10). Bench workload is rated Expert (FCI 62.3 / 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.