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糖心玛瑙项链报价是多少？需要注意哪些问题？

糖心玛瑙项链报价是多少？需要注意哪些问题？

浏览：53次 | 提问时间： 07-22 11:44

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掠过发间 07-22 11:53

这样没有图不知道怎么说.可以分三方面来鉴别。⑴透明度：真玛瑙透明度不如人工合成的好，稍有混沌，有的可看见自然水线或“云彩”，而人工合成的玛瑙透明度好，象玻璃球一样透明。⑵重量：真玛瑙首饰比人工合成的玛瑙首饰重一些。⑶温度：真玛瑙冬暖夏凉，而人工合玛瑙随外界温度而变化，天热它也变热，天凉它也变凉。怎样选择玛瑙首饰呢？首先要根据自己的喜爱来选颜色。红色玛瑙首饰最贵重，如选玛瑙项链须注意每珠子颜色的深浅要一样，没有杂色，珠子的大小搭配要适当，还要注意光洁度要好。然后，把项链提起来看看是否垂直，每个珠子是否都垂在一条线上，如果项链出现弯曲，这说明有的珠子的眼儿偏了，加工工艺粗糙。玛瑙是常用于镶嵌首饰和雕刻工艺品的一种宝石。真假鉴选方法如下：
(1)颜色：真玛瑙色泽鲜明光亮，假玛瑙的色和光均差一些，二者对比较为明显。天然红玛瑙颜色分明，条带十分明显，仔细观察，在红色条带处可见密集排列的细小红色斑点。用石料仿制的假玛瑙烟壶，多数在底部呈花瓣形花纹，络成“菊花底”；而染色蓝玛瑙颜色艳丽、均一，给人一种假的感觉。
(2)质地：假玛瑙多为石料仿制，较真玛瑙质地软，用玉在假玛瑙上可划出痕迹，而真品则划不出。从表面上看，真玛瑙少有瑕疵，劣质则较多。
(3)工艺质量：优质高玛瑙的生产工艺严格且先进，故表面光亮度好，镶嵌牢固、周正，无划痕、裂纹。
(4)级别：水胆玛瑙是玛瑙中最为珍贵的品种，特征是玛瑙中有封闭的空洞其中含有水。各种级别的玛瑙，都以红、蓝、紫、粉红为最好，并且要求透明、无杂质、无沙心、无裂纹；其中，块重4.5公斤以上者为特级，1.5公斤以上者为一级，0.5－1.5公斤为二级。玛瑙石有自然色的，也有后加工染色的。自然色主要有红色、琥珀色和白色。其中，以红色为最好。市面上出售的蓝色、紫色的玛瑙首饰不是本色，是经过加工后染上的，用几年后会出现退色。经染色的玛瑙大都是自然杂色，不易直接加工成首饰。

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糖心玛瑙项链报价是多少？需要注意哪些问题？

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糖心玛瑙项链报价是多少？需要注意哪些问题？