Mini Thunder Egg-Cutting Stone Experience

Lei Gongdan is a natural crystal geode, which is called Lei Gongdan because the earth and rocks are exposed on the surface after a heavy thunderstorm. Different from the geode that has been cut out on the market, you can now experience the fun of Stone-cutting by yourself! Give it a try and dig your own crystal hole! https://cdn1.cybassets.com/s/files/5993/ckeditor/pictures/content_20f1b764-dae1-44fc-8c5e-f53a7575fbab.jpg https://cdn1.cybassets.com/s/files/5993/ckeditor/pictures/content_84a60e09-5aee-4e03-b531-94f4a2c9e4e8.jpg <Science Tips> In fact, Stone is not a kind of stone, but a volcanic ball with reddish-brown silica on the outside, which cools and shrinks in the ball and grows into a solid. In fact, it is the product of volcanic lava flow. Sometimes it forms nodules, sometimes becomes crystal balls, and is hidden in layers of rhyolite, dense tuff or perlite. Scientists have not yet reached a consensus on the formation process of Lei Gongdan: Some scientists think from the typical internal shape and characteristics of Thunder King Egg that it is formed by the diffusion of gas in the stone and breaking the outer edge; Some scientists also believe that the internal pattern of Lei Gongdan is the result of dry colloids. No matter what the reason is, once the hole containing Thunderball is formed, further development will have a lot of changes. It can be due to the time, degree, internal filling and type of thunderbolt egg formed, As well as various other physical properties, they are extremely different, showing a colorful and ever-changing appearance. (Source: Shifang Crystal Museum) Specifications: ► Size: 3~5cm ► Material: natural crystal rough stone ► Origin: China Precautions: ► Please be careful when knocking ► The product does not contain percussion tools