ZME Science on MSN4 个月
What are thundereggs? The rare, chalcedony-filled rocks
Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...
来自MSN12 天
Enhydros, Agates, And Fluid Inclusions: The Ancient Rocks With A Juicy Center
An enhydro is a hollow nodule that contains water, most often made up of chalcedony – a form of silica that consists of ...