火欧泊的颜色三要素特征  

The Characteristics of the Three Elements of Fire Opal’s Color

作　　者：潘鑫 郭颖[1] PAN Xin;GUO Ying(School of Gemmology,China University of Geosciences(Beijing),Beijing 100083)

机构地区：[1]中国地质大学(北京)珠宝学院,北京100083

出　　处：《中国宝玉石》2020年第1期94-105,共12页China Gems & Jades

摘　　要：火欧泊也称墨西哥欧泊,泛指橙黄、橙红至红色体色,透明到半透明、无变彩或有少量变彩的类似于果冻样的欧泊,形成于火山熔岩的次生矿.火欧泊的颜色一般占价值评价的50%以上,被称为其最重要的质量评价因素之一,因此促进完善火欧泊的颜色评价系统应该被视为业内非常重视的研究发展方向.本文选取30颗橙红色系的墨西哥火欧泊作为研究对象,结合前人的研究资料,通过常规宝石学测试、镜下观察,分析墨西哥火欧泊样品的宝石学特征;通过爱色丽X-Rite SP62积分球式分光光度计获取样品的颜色参数,结合该领域较前沿的CIE 1976 L*a*b*均匀色空间理论,量化墨西哥火欧泊样品的明度、亮度、饱和度等色度学参数,分析火欧泊颜色三要素之间的特征关系.Fire opal, which is also called Mexican opal, refers to orange-yellow, orange-red to red body color, transparent to translucent, no color change or a little color similar to jelly-like opal. Fire opal is formed in the secondary ore of volcanic lava. The color factor is one of the most important quality evaluation factors of fire opal, and generally accounts for more than 50% of the value evaluation. Therefore, the research development direction that should be regarded as very important in the industry is to promote the development of fire opal color evaluation system. In this paper, 30 orange-red-colored Mexican fire opals were selected as the study objects, with the aim of combining the previous research data to analyze the gemological features of Mexican fire opal samples through general gemological tests and microscopic observations. Simultaneously, all factors of value assessment for fire opals were summarized, and lightness, brightness, degree of saturation and other colorimetric parameters of the Mexican fire opal samples were quantified and feature relationships among the three elements of fire opal colors were analyzed by combining color parameters of the samples obtained by X-Rite SP62 integrating-sphere spectrophotometer with the advanced CIE 1976 L*a*b* uniform color space theory in this field.

关 键 词：火欧泊 色度学 宝石学特征 

分 类 号：P574.2[天文地球—矿物学]