用静水力学法无拆卸评价镶圆钻首饰金属成色(密度)的可行性分析  

A FEASIBILITY ANALYSIS OF HYDROSTATIC MECHANICS METHOD IN NON-DISASSEMBLED APPRAISING THE METAL QUALITY(DENSITY) OF STANDARD ROUND DIAMOND JEWELRY

作　　者：张利春[1] 赵永超[2] 

机构地区：[1]国家珠宝玉石质量监督检验中心,北京100034 [2]北京大学地质学系,北京100871

出　　处：《宝石和宝石学杂志》1999年第2期45-48,共4页Journal of Gems & Gemmology

摘　　要：统计分析表明，目前市场上钻石绝大部分＜0.42ct，钻石戒指主要在1．5～3．6g之间，钻戒比则一般不超过3．2％，并且钻重和戒重之间有较好的线性关系。在此基础上，根据对圆钻体积和重量公式的推导结果，提出对镶单圆钻首饰的镀金重量及成色（密度）用静水力学法进行估测是可行的，金属重量的误差不超过0.01g，密度相对误差不超过1．2％。给出了测算步骤，并指出本法对其它具圆钻切工的宝石也是适用的。A statistic of 3 926 diamond jewelry indicates that about 97% of the diamonds in China market are standard round, the carats of the most diamonds are no more than 0. 42 ct and the ratio ofweight of diamond to ring is less than 3. 2%. The statistics also show a good linear reIation betweenthe weight of diamonds and rings. AccordinS to these statistical results and the estimate formulas ofthe weight and volume of standard round diamond developed before, it is cortified that the hydrostaticmechanios method is feasible in non-disassembled measuring the weteht and quality (density) of themetal of standard round diamond jewelry. The developed formulas show that the error for esttriatingthe weight of metal is less than 0.01 gram whilc for density, no more than 1. 2%. The measuring stepsare recommended in this paper. It is affirmed that such method also is acceptable for other gems in asame shape as standard round diamond.

关 键 词：钻石 圆钻切工 成色 密度 误差 评价 

分 类 号：P619.28[天文地球—矿床学]