推荐回答(3个)
可以,不过只能作为参考。荧光反应强的,是注过胶的,没反应的是原矿的,只限于鉴定真松石是否原矿。
松石的真假鉴别
■看颜色、纯净度
颜色越深越纯正、越均匀,纯度越高的松石造假的可能性越大;反之,真货的可能性就越大。绿松石因其形成的特殊情况,内部往往杂有很多铁线和水浸蚀的痕迹,纯度极高的净货是非常少的,尤其是大货,一旦收藏爱好者看到大批高色、高纯度的大货。90%可能是白松石注胶的,9.9%可能是杂石注胶的,如果价格再低廉,100%是仿制品。
■看密度、硬度和亮度
石质密度越大硬度就越大,重量、亮度也就越高。
越重、越硬、越亮的,就越有可能是A货。之所以只说是“越有可能”,是因为现在注胶的B货和注胶的仿制品,它们灌注的胶水有两种:一种是国产的,这个亮度不会太高,容易分辨;另一种是进口的,其亮度完全可以和浸胶的A货比美,但B货的重量通常会较轻,白松石和杂石就表现不出来。C货是上色痕迹很明显,凸凹处明显有色斑。
■看铁线
这只能分出仿制品和真品,不能分出A、B货。真品绿松石的铁线纹理清晰、发展自然,且颜色较正;而仿制品往往纹理模糊、伸展生硬,颜色也不是黑、白、黄褐的正色。不过有一种铁线松石的仿制品,因为它的铁线太过清晰、纯正,反而显得假了。
■闻色味
仿制品和B货(尤其是新出产品),胶的气味会特别大,即使放很长时间,放在鼻子前闻还是有一些气味的;而A货是没有的(浸胶的A货刚做出来时有些气味,随着时间的推移,会在一个月内消失)。
■用火烧
仿制品和B货因内部注有胶水,遇火后胶水燃烧变黑、发出胶臭味;A货则不变色(浸胶货可能会有少许胶味、轻微发黄)。
■看裂纹
若饰品上的裂纹多而杂,还很宽很长,一定是B货。因其本来货质较差,在注胶受高温时自然易裂开了;若裂纹多、杂,越细小、紧密、呈白痕状,98%可能是浸胶A货。若缺损较多、裂纹少或无裂纹、细长紧密、发灰发黑,一般是天然A货,而仿制品通常无裂痕。
这个我还真遇到过有的注胶不荧光的,最实际的检测方法其实是火烧,打火机烧个十几秒有化学物质的直接冒烟,黑烟,原矿没有任何变化。好像是用植物胶不会荧光。
不能100%鉴别准确;紫光灯下是否有荧光,只能作为鉴别松石是否被优化或者处理过的参考方法之一;鉴别方法一定是经验+多重方法,或者直接去国检。
必须了解什么是荧光。荧光,又作“萤光”,是指一种光致发光的冷发光现象。当某种常温物质经某种波长的入射光(通常是紫外线或X射线)照射,吸收光能后进入激发态,并且立即退激发并发出比入射光的的波长长的出射光(通常波长在可见光波段);而且一旦停止入射光,发光现象也随之立即消失。具有这种性质的出射光就被称之为荧光。
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