压制琥珀的新认识

随着琥珀市场需求的增加及琥珀优化处理技术的改进与创新,压制琥珀呈现外观逼真、结构复杂、方法多样的新态势。利用宝石显微镜、偏光显微镜、红外光谱仪对压制金珀、压制血珀、＂爆花＂压制琥珀、烤色压制琥珀、压固蓝珀、压固胶结蓝珀、压制蜜蜡等样品的宝石学参数、显微结构、红外吸收光谱进行了研究与分析,结果显示,碎粒-碎粉结构、红色斑点结构、不含＂血丝＂状构造的粒状＂镶嵌＂结构、碎块胶结结构等是压制琥珀的结构鉴定特征;颗粒间分布的＂太阳光芒＂、紊乱流纹、叶脉状流纹、丝瓜瓤状流纹等是压制琥珀的内含物鉴定特征;若蓝珀中的红外光谱I=2 932cm-1/I=1 723cm-1处的吸收强度比值接近1∶1,暗示着该蓝珀可能经过了优化处理。

Latest Progress of Pressed Amber

With the increasing demand of amber and the improvement and innovation of optimization treatment techniques of amber,there are some new trends in the pressed amber market.This paper attempts to explore gemmological parameters,detailed microtexture observations and IR spectra of pressed amber such as pressed golden amber,pressed red amber,＂sunflower＂ pressed amber,roast pressed amber,pressed blue amber,pressed-cemented amber,pressed opaque amber by using gemmological microscope,polarizing microscope and scanning electron microscope（SEM）.The results show that the typical textures for the identification of pressed amber are granular texture,red spot texture,mosaic texture without red flow layers,cemented texture and so on.The inclusions for the identification of pressed amber are granular ＂sunflower＂ distributed around boundaries,disorganized veins,leaf-like veins,sponge-like flow layers and so on.If the ratio of I=2 932 cm-1/I=1 723 cm-1 in the IR spectrum of blue amber is close to 1,it is implied that the blue amber may have undergone optimization treatment.