watermelon tourmaline, color zoning - gem formation

Rough bi-colored "watermelon tourmaline" crystal. Photo by Paweł Maliszczak. Licensed under CC By-SA 4.0.

Green Tourmaline Rough

Rough bi-colored "watermelon tourmaline" crystal. Photo by Paweł Maliszczak. Licensed under CC By-SA 4.0.

Article: Gem Formation: How are Gemstones Created?

Credit: Paweł Maliszczak

GemstoneTourmaline, Watermelon Tourmaline
Natural or man madeNatural
Gem StateRough
ColorGreen, Pink
TransparencyTransparent