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《宝石和宝石学杂志》主要报道国内、国际宝石学研究和珠宝科技的新成果与新动态,追踪珠宝市场信息,使之成为珠宝业对外宣传的窗口和引进国外最新成果的重要渠道。现设栏目有“研究与探讨”“珠宝检测”“宝石资源”“首饰设计”“宝石改善”“加工与制作”“珠宝评估”“珠宝营销”“宝石实验室快讯”“世界博览”“专家论坛”“行业聚焦”“热门话题”“宝石学教育”“珠宝之窗”等。本刊为季刊,大16开本,公开发行。     

中国云南省红河剪切带宝石找矿潜力评价--与越南北部安沛地区宝石矿床之对比

东南亚一个具有重要经济价值的宝石矿床位于越南北部安沛(Yen Bay)地区的Lue Yen市附近。不同矿化的地质背景均位于红河剪切带南部的Day Nui Con Voi变质带中。变质程度已达角闪岩相，变质温度。780℃，变质压力7kb。变质带主要由片麻岩和大理岩组成，伴有浅色岩和伟晶岩。至少已发现三种不同类型的原生宝石矿床：(1)产于大理岩中的红宝石和尖晶石矿床，部分具有极高的宝石品质；(2)产于片麻岩中的红宝石矿床，这类矿床以大的六方柱为特征；(3)产有电气石晶体的伟晶岩型矿化，有明显的颜色分带。类似的宝石矿床可能赋存于红河剪切带内适当的寄主岩石和围岩中，尤其是在中国的云南省内更有可能产出。     

“米黄玉”的宝石矿物学特征

湖北省郧县产有一种矿石,因其色如黄米而俗称为＂米黄玉＂,其质细腻柔润、色泽纯净剔透。本研究选取6件＂米黄玉＂样品,采用常规宝石学方法、薄片观察、红外光谱、X射线粉末衍射、LA-ICP-MS等测试手段,对其矿物学、宝石学和谱学特征进行了研究,并对其品质评价进行了探讨。结果显示,＂米黄玉＂样品的组分纯净,结构呈短柱状晶体镶嵌排列,单个晶体的颗粒大小在长0.240~0.880 mm、宽0.064~0.160 mm范围内波动,并呈定向排列;其主要化学成分为CaCO3,含少量的MgCO3,成分纯净,杂质元素较少。依照GB/T 16552—2003《珠宝玉石名称》,对宝石级＂米黄玉＂应直接采用＂大理石＂的名称,可在备注中注明：俗称＂米黄玉＂。     

On the Origin of the Carat as the Unit of Weight for Gemstones

The carat is the unit of weight for diamonds and other gemstones.It corresponds to the average weight of the seeds of a leguminous tree.What kind of tree is this?We have studied the samples from Ethiopia,Egypt,Cyprus and the United States.The tree is neither“Kuara“nor“Locust“（Robina pseudoacacia Linn.）,but rather Carob(Ceratonia Siliqua).In Ethiopia,as called by local inhabitants,“Kuara“is a species of Erythrina-E.brucei rather than E.abyssinica.As might be expected,using the seeds as a means of weighing an extremely valuable commodity is not very scientific.Before 1907,at various times and in various countries,there were at least twenty-three stan-dards for the carat ranging from 187.00mg to 215.990mg.The metric carat equal to 200mg was proposed in Paris in 1907.It was adopted in the United States on July1,1913 and now is the world-accepted standard.But in reality,the standard of the carat is still confused with respect to its usage throughout the world .This is why the author reiterates that the standard of the car-at should be integrated with the metric system.