alluvial diamondの例文

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1. Children are also trafficked to alluvial diamond mining areas for forced labor.
2. Rich alluvial diamond deposits make Namibia a primary source for gem-quality diamonds.
3. It ranks as the fourth-largest gem-quality diamond and the largest alluvial diamond ever discovered.
4. Alluvial diamonds have been found, near the borner with the Central African Republic border.
5. Since 1869, the various gravels along the Vaal River have been worked intensively for their content of high-grade alluvial diamonds.