本指南专为向素未谋面的经销商汇款的买家而写。每份指南都详细说明了文件应包含哪些内容、信息披露应如何呈现，以及风险究竟由谁承担。
Nearly every emerald reaches the market with surface-reaching fissures, and nearly every one has had those fissures filled. Oiling is not a scandal; it is the standing condition of the emerald trade, accepted for centuries on one term: the amount of filler present is graded, disclosed and priced.
Most sapphire on the market has been heated.