中文摘要：

＂岩玉＂样品有豆荚、佛、观音等款式,微泛＂起荧＂的橄榄绿色并有局部＂起皮＂现象,半透明,玻璃光泽,相对密度3.30,折射率1.652-1.665、双折射率0.013、二轴正晶,长波紫外光下发蓝白色荧光。X射线粉末衍射（XRD）、扫描电镜（SEM）、能量散射谱（EDS）、红外光谱（IR）测试研究表明,＂岩玉＂样品是由硬玉矿物组成。偏光显微镜下,＂岩玉＂具典型的似斑状结构,表明硬玉矿物结晶形成有两个世代：早世代为半自形柱状斑晶,柱长1.2-1.5 mm、柱宽0.35-0.8 mm;晚世代为他形粒状基质,粒径0.2-0.5 mm,在硬玉矿物的裂隙或解理缝中充填有蓝色染剂。＂岩玉＂的似斑状结构是造成样品局部＂起皮＂现象的主要原因。长波紫外光下的蓝白色荧光可能与矿物的裂隙或解理缝中蓝色染剂有关。

英文摘要：

The art products of ＂Yan jade＂are usually shaped in cabochon cut,Buddha or Guanyin,appear slightly olivine-green ＂glimmering＂and locally ＂microwavy lined（striations）＂.The ＂Yan jade＂ is semitransparent,with vitreous luster and density of 3.30.The sample illumines blue-white fluorescence while exposed to long-wave UV light.The refractive index（R.I） measured reveals the values of 1.652 to 1.665 with birefringence of 0.013 and biaxial positive crystal.According to X-ray diffraction（XRD）,scanning electron microscopy（SEM）,X-ray energy dispersive diffraction（EDS） and infrared spectroscopy（IR） analyses,mineral component of ＂Yan jade＂ consists of jadeite.By polarizing microscope,the suggested texture of ＂Yan jade＂ is typical porphyro-like.The results indicate that the jadeite of ＂Yan jade＂ has two generations： subhedral-prismatic crystal early with 1.2-1.5 mm in length and 0.35-0.8 mm in width and allotriomorphic granular crystal late about diameter（D） of 0.2-0.5 mm.There are blue dyeing agents in cracks or cleavages of jadeites.The＂microwavy lined（striations）＂ of ＂Yan jade＂ is related to major porphyro-like texture.Blue-white fluorescence exposed to long-wave UV light is related to probably blue dyeing agent in cracks or cleavages of jadeite.