crystallomancy（n.）
"水晶占卜"，1610年代； 见 crystal + -mancy。
The operator first muttered over the crystal (a beryl was preferred) certain formulas of prayer, and then gave it into the hands of a young man or a virgin, who thereupon, by oral communication from spirits in the crystal, or by written characters seen in it, was supposed to receive the information desired. [Century Dictionary]
操作者首先在水晶上低声念诵某些祈祷公式（以绿柱石为佳），然后将其交给一个年轻男子或处女，随后，通过水晶中精灵的口头沟通或在其中看到的书写字符，被认为可以获得所需的信息。[世纪词典]
该词起源时间：1610年代