The richest color lives at the boundary

Tourmaline Zoning · n = 347

Verdelite rind

12%

+2.1%

Mid-green transition

21%

+5.8%

Pale outer core

33%

−0.7%

Bright pink zone

24%

−1.2%

Rubellite core

10%

+3.9%

Mean saturation index

47.8%

This is the Tourmaline Crystal Slice design system, applied by Curio Design — a design-style library for AI agents. Full Tourmaline Crystal Slice guide → designbycurio.com/learn/tourmaline-rubellite-slice-plate