Prismatic Starburst 921

Cutting Diagram & Optical Specifications

Target Material

Cubic Zirconia (CZ) & YAG/GGG Synthetics

Refractive Index

RI 2.15 (Critical Angle 27.7°)

Cut Shape

Heptagon

Facet & Tier Count

42 facets · 6 tiers

Index Gear

84 index

Length / Width Ratio

1.03

Optical Optimization Score

0.914

Brightness & Contrast

0.97 / 0.92

Deliverable

Instant Printable PDF Cutting Instructions

Prismatic Starburst 921 is a meetpoint gemstone faceting pattern computationally optimized for Cubic Zirconia (CZ) & YAG/GGG Synthetics (RI 2.15) on a 84-tooth index gear. Download includes complete tier-by-tier pavilion, girdle, and crown cutting angles, index numbers, and meetpoint diagrams.