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English

Before the development of the Argyle diamond mine in Australia in 1986, most brown diamonds were considered worthless for jewelry; they were even not assessed on the diamond color scale, and were predominantly used for industrial purposes.

Chinese

1986年澳大利亚阿盖尔钻石矿(英语:Argyle diamond mine)开发之前,褐色钻石被认为不能用于制作首饰,只用于工业用途,甚至钻石颜色分级都不评估褐色钻石。