The sample was made of FK-2 glass and icelandcrystal, between which either glycerine or organic silica gel could be used for gluing.
该棱镜可用甘油或有机硅胶将FK-2玻璃与冰洲石晶体胶合而成。
2
In order to save the rare Icelandcrystal and increase the transmittance of polarizing prism, a polarizing prism made of Icelandcrystal and glass was designed.
Several centuries underwater have rendered the Alderney crystal opaque, but Dr Ropars and his team are now examining it, and believe it may be Iceland SPAR.