Agatized Coral hunting is becoming one of my absolute favorite things to do... beautiful colors, geodes, bubbly botryoidal agate... what else could you ask for?! Finding a fossil/gem/mineral all in ...

Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made of quartz, chalcedony, or agate. They are nodule-like rocks typically ...

Chalcedony, from the Greek trade city of Kalzedon, is a variety of agate showing layers in grey to brown. Most specimens show a circular layering, but some show an outer rim of circular layers and an ...