Onyx Glow 428

Cutting Diagram & Optical Specifications

Target Material

Natural & Lab-Grown Diamond

Refractive Index

RI 2.42 (Critical Angle 24.4°)

Cut Shape

Truncated Cushion Octagon

Facet & Tier Count

119 facets · 11 tiers

Index Gear

96 index

Length / Width Ratio

1.00

Optical Optimization Score

1.031

Brightness & Contrast

1.11 / 1.08

Deliverable

Instant Printable PDF Cutting Instructions

Onyx Glow 428 is a meetpoint gemstone faceting pattern computationally optimized for Natural & Lab-Grown Diamond (RI 2.42) on a 96-tooth index gear. Download includes complete tier-by-tier pavilion, girdle, and crown cutting angles, index numbers, and meetpoint diagrams.