Boreal Galaxy 428

Cutting Diagram & Optical Specifications

Target Material

Natural & Lab-Grown Diamond

Refractive Index

RI 2.42 (Critical Angle 24.4°)

Cut Shape

Truncated Pentagon

Facet & Tier Count

51 facets · 10 tiers

Index Gear

120 index

Length / Width Ratio

1.05

Optical Optimization Score

0.977

Brightness & Contrast

0.92 / 1.03

Deliverable

Instant Printable PDF Cutting Instructions

Boreal Galaxy 428 is a meetpoint gemstone faceting pattern computationally optimized for Natural & Lab-Grown Diamond (RI 2.42) on a 120-tooth index gear. Download includes complete tier-by-tier pavilion, girdle, and crown cutting angles, index numbers, and meetpoint diagrams.