Description
Eye clean clarity means the cutter can focus on the 5.48CT Chrome Tourmaline Rough without avoiding visible inclusions. This vivid green facet rough comes from Tanzania. The color often appears darker when you look down the C-axis. The 12.82×11.11×5.08mm blocky shape allows for a high yield. This rough is suitable for emerald or oval shapes.
5.48CT Chrome Tourmaline Rough Specifications
- Lapidary notes: Blocky shape for high yield; Clean rough; Open C-axis
Cutting Notes
The C-axis is open in this stone. You can place the table across the C-axis to keep the green color light. You can place the table parallel to the C-axis for a darker tone. The blocky dimensions support a wide variety of shapes with minimal waste. The rough is clean, so you can plan the facet arrangement based on the blocky shape.
Chrome Tourmaline is brittle and sensitive to heat. You must keep the stone cool during the grinding process. Avoid heavy pressure on the lap to prevent fractures. The material has a critical angle of about 38 degrees. You must cut pavilion angles above this limit to prevent light leakage and windowing. Birefringence is high, so you may see doubled facet edges.
Cutter’s tip: Use the open C-axis to calibrate the final color saturation before you preform the crown.
Every stone is filmed on video before it is listed, so what you see is the stone you get. For background on Chrome Tourmaline, see the GIA Tourmaline guide. Browse more Chrome Tourmaline faceting rough from Jackson’s Gems.
Related Guides
- Ethiopian Paraíba Tourmaline: What Cutters Should Know
- Masterclass: Understanding Pleochroism & Gemstone Orientation
New to cutting Tourmaline? See the Lapidary Guide.
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