OffTheDop
Refractive Index 1.54 Critical Angle 40.5° Hardness 7 Mohs

Quartz, Amethyst & Citrine Faceting Diagrams

Recommended Rough: Amethyst, citrine, ametrine, smoky quartz, rose quartz, rock crystal

Quartz (RI 1.54) has a steep 40.5° critical angle—which is why generic faceting patterns cut at 39°–41° suffer from washed-out tilt windows right through the table.

All RI 1.54 cuts in this collection are specifically optimized for quartz's narrow total-internal-reflection cone, keeping pavilion mains and culets safely above 40.5° while shaping crown angles to maximize scintillation in amethyst, citrine, ametrine, and smoky quartz.

Top Quartz & Amethyst Cutting Diagrams (RI 1.54)

Handpicked showcase renders and highest-scoring optical patterns for RI 1.54 rough.

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