A bicolour tourmaline slice is a thin, cross-sectional cut of a tourmaline crystal that beautifully mimics a real slice of watermelon, featuring a vibrant pink or red core surrounded by a distinct green outer rind. This striking natural pattern is highly coveted by collectors and jewelry designers alike.… True bicolour tourmaline displays unique concentric zoning rather than a simple top-to-bottom color shift, making authentic cross-sections exceptionally rare and highly sought after… From Afghanistan Weight : 11 grams Sizes: 20x16x10mm