Watermelon Tourmaline Roughs — Why Those Color Bands Are So Unique 🍉

Just got some gorgeous watermelon tourmaline roughs in, and I wanted to share why this stone's color zoning is so special.

What Makes the "Watermelon" Look?

The iconic pink center + green outer layer isn't random — it's a growth story frozen in crystal form.

Tourmaline grows in pegmatite veins over millions of years. During formation, the chemical environment around the crystal changes:

• Early growth (core): Manganese-rich conditions → pink/red center
• Later growth (rim): Chromium/vanadium enters the mix → green outer layer
• It's literally the same crystal recording different geological moments as it grew outward. No two stones have identical banding because no two growth histories are the same.

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