Payments can be for diamond.Logical formLearned from6 sentences. Rough diamonds may be obtained by using.Logical formLearned from6 sentences. A (certification system) may be aimed at stopping (blood diamonds).Logical formLearned from6 sentences. (Blood diamonds) can be to (history books).Logical formLearned from6 sentences. Representative can be from (diamond producing).Logical formLearned from6 sentences. A (diamond certification system) can be international.Logical formLearned from6 sentences. Blue diamonds can be rare.Logical formLearned from6 sentences. A female may accept diamonds.Logical formLearned from6 sentences. A female may keep diamonds.Logical formLearned from6 sentences. Exports can be constituted-of-or-filled-with polished diamonds.Logical formLearned from5 sentences. Prices can be constituted-of-or-filled-with rough diamonds.Logical formLearned from5 sentences. Natural resources may include diamonds.Logical formLearned from5 sentences. (Diamond imports) may pertain-to a country.Logical formLearned from5 sentences. Diamonds can be refined.Logical formLearned from5 sentences. The west can be rich in diamond.Logical formLearned from5 sentences.