昌化鸡血石“地”的研究及其质量影响因素

Study on "Di" of Chicken-Blood Stone from Changhua and Effective Factors of Quality Grading

在野外地质调查的基础上,对不同品种昌化鸡血石的"地"进行了常规宝石学特征鉴定、X射线粉末衍射以及红外光谱的分析测试。研究结果表明,昌化鸡血石"地"的主要矿物成分及其质量分数是影响其质量的重要因素,呈明显的规律性和过渡性:地开石的质量分数越高,结构有序度越好,其"地"的质量就越好;随着明矾石的加入,"地"的透明度逐渐变差,摩氏硬度也增大;伴随明矾石的增多以及石英的加入,昌化鸡血石的"地"从"软地"过渡到"刚地";当石英的质量分数达到25%以上时,昌化鸡血石的"地"则属于质量较差的"硬地"。

Based on the field geological observation, the different kinds of “Di” of chickenblood stones from Changhua are tested by using the means as conventional gemmological methods,XRD and IR. The results show that the quality of “Di” of chicken-blood stones from Changhua is closely related to the compositions and the content of the main mineral. The higher content of dickite and the better order degree of the structure could result in the better quality of “Di”. Alunite added in the chicken-blood stones could reduce the transparency of “Di” while the hardness increases. From the “Ruan Di” to the “Gang Di”, the content of alunite and quartz increases. When the content of quartz is over 25%, the “Di” of chickenblood stones from Changhua belongs to the “Ying Di”.