通过阴极发光仪对养殖珍珠和处理养殖珍珠的阴极发光特征进行了研究,结果表明:在阴极射线激发下,淡水养殖和处理珍珠发黄绿或绿色光,而各色海水养殖和处理珍珠不发光;阴极显微观察可见部分处理珍珠层的表面微破损。淡水珍珠和海水珍珠不同的发光特点与其所含的微量过渡元素有关:淡水珍珠因富Mn而发光,海水珍珠则由于贫Mn富Sr而不发光。阴极发光特征可作为无损鉴别海水、淡水养殖珍珠以及处理养殖珍珠的主要依据之一。 The cathodoluminescence characteristics of cultured pearl and cultured pearl were studied by means of cathode luminometer. The results showed that freshwater cultured and treated pearl yellowish green or green light under the excitation of cathode ray, Negative microscopic observation showed that some of the surface treatment of nacre micro-damage. The different luminescence characteristics of freshwater pearls and seawater pearls are related to the trace elements contained in them: freshwater pearls emit light due to Mn enrichment while sea pearls do not emit light due to depletion of Mn-rich Sr. Cathodoluminescence can be used as one of the main criteria for non-destructive identification of seawater, freshwater cultured pearl and cultured pearl.