萤石手链(收于2019年）古代印度人发现，有个小山岗上的眼镜蛇特别多，它们老是在一块大石头周围转悠。每当夜幕降临，这里的大石头会闪烁微蓝色的亮光，许多具有趋光性的昆虫便纷纷到亮石头上空飞舞，青蛙跳出来竞相捕食昆虫，躲在不远处的眼镜蛇也纷纷赶来捕食青蛙。于是，人们把这种石头叫作"蛇眼石"。后来才知道蛇眼石就是萤石。
萤石，又称“氟石”，来自火山岩浆中，以氟为主，主要成分是氟化钙。颜色多样，透明、玻璃光泽，硬度4，解理好。之所以叫萤石，是因为矿物内的电子在外界能量的刺激下，低能状态与高能状态互相转换的过程中会发光，尤其在紫外线或阴极射线照射下会发出如同萤火虫一样的荧光，所以而得名。但当萤石含有一些稀土元素时，它就会发出磷光，绝大多数夜明珠都是萤石材质的。
"世界萤石在中国，中国萤石在浙江，浙江萤石在金华，金华萤石在武义"长久以来，这已经成为萤石业内的共识。中国是世界上萤石矿产最多的国家之一，主要产于湖南东南部的郴州一带，此外浙江、福建等地也有出产。为了保护萤石资源，中国早在2003年就已经不再发放新的萤石开采许可证。
萤石的处理方法主要有以下几种：加热处理可使暗蓝至黑色萤石变成蓝色。充填塑料或树脂，其主要目的是愈合表面裂隙，使其在加工或佩戴时不产生裂隙。辐照处理可使无色的萤石通过辐照产生紫色。The ancient Indians found that there were many cobras on a small hill. They were always wandering around a big stone. When night falls, the big rocks here will flash a slight blue light. Many phototactic insects will fly over the bright Stone one after another. Frogs will jump out to hunt for insects. Cobras hiding nearby will also come to hunt for frogs. Therefore, people call this kind of Stone "Snake Eye Stone". It was later discovered that Snake Eye Stone is fluorite.
Fluorite, also known as fluorspar, comes from volcanic magma and is mainly fluorine, with calcium fluoride as the main component. Colors varied, transparent, glassy, hardness 4, cleavage good. Fluorite is called because the electrons in the mineral emit light when the low-energy state and the high-energy state are switched to each other under the stimulation of external energy, especially when they emit fluorescent light like fireflies under the irradiation of ultraviolet rays or cathode rays. However, when fluorite contains some rare earth elements, it emits phosphorescence. Most of the night-luminescent pearls are made of fluorite.
"The world fluorite is in China, China fluorite is in Zhejiang, Zhejiang fluorite is in Jinhua and Jinhua fluorite is in Wuyi" has long been a consensus in fluorite industry. China is one of the countries with the largest amount of fluorite minerals in the world. It is mainly produced in Chenzhou area in southeast Hunan. In addition, it is also produced in Zhejiang, Fujian and other places. In order to protect fluorite resources, China stopped issuing new fluorite mining licenses as early as 2003.
There are mainly the following methods for fluorite treatment: heating treatment can turn dark blue to black fluorite into blue. Filling plastic or resin, its main purpose is to heal surface cracks, so that it does not produce cracks when processing or wearing. Irradiation treatment: colorless fluorite can produce purple by irradiation.
