A watermelon 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 watermelon tourmaline displays unique concentric zoning rather than a simple top-to-bottom color shift, making authentic cross-sections exceptionally rare and highly sought after… Primary Sources: The finest-grade slices typically originate from world-renowned mining regions like Paprok, Afghanistan and Minas Gerais, Brazil... From Afghanistan Weight : 20 carats Sizes: 12x12x2mm 12x12x2mm 12x12x1mm