雷公墨是我国广东雷琼地区人民对当地一种散布状产出的黑色玻璃质岩石的俗称,对雷公墨的记载最早见于我国唐朝刘恂所著《岭表录异》一书。言“雷州骤雨后,人于野 Lei Gongmo is a common name for the people in Renqiong area of ​​Guangdong Province, a black glassy rock that is scattered in the local area. The records of Lei Gongmo were first seen in the book “The Difference in Lingshi” written by Liu Xie of the Tang Dynasty in our country. Say "Leizhou showers, people in the wild