Dec 5, 2025
Back to stargazing from the cave. Nebula with horns in the sky, big white bull painted on the wall. Tempera on agate thunderegg
seen from Yemen
seen from Hungary
seen from United States
seen from Malaysia
seen from United Kingdom
seen from Brazil
seen from United Kingdom
seen from Brazil
seen from Malaysia
seen from Malaysia
seen from Brazil
seen from Italy
seen from United States
seen from United States
seen from Malaysia
seen from United States
seen from United States
seen from United Kingdom
seen from Malaysia
seen from United States
Back to stargazing from the cave. Nebula with horns in the sky, big white bull painted on the wall. Tempera on agate thunderegg
Fluorescent Fox Agate
Fox / Crater Agate
A thunderegg is a spherical or ovoid nodule-like rock, similar to a filled geode, formed within rhyolitic volcanic ash layers as a concretio
Thundereggs usually look like ordinary rocks on the outside, but slicing them in half and polishing them may reveal intricate patterns and colors.
A thunderegg is a spherical or ovoid nodule-like rock, similar to a filled geode, formed within rhyolitic volcanic ash layers as a concretion of silica
Im so curious if this beach rock is a thunder egg of some sort, but I don't wanna cut it in half either haha
The crystal like veins look like moss agate or something, with the green
fuck you -sticks amethyst in your chalcedony-
Thunder Egg.
Baker Ranch Thunder Egg
Geology Facts with Kail!
Ok, so I'm very likely to not be the only one who saw this, but the petrified orange that Stede finds and ends up splitting with his daughter? Not a real petrified orange (unsurprising I'm sure). But it *is* super cool still because it is a Thunder Egg!
Now what is a Thunder Egg? From a geology standpoint, they are a type of agate that resembles a geode (agate being a solid rock thing and geode usually being the sparkly hollow ones). These, like all agates, can actually be traced back to the bed/area they were found in based on appearance (and probably chemical/science stuff). If I had to guess the one used in the show is from is actually from Canada (based on some pictures and the fact that the thunder egg I own is Canadian and looks quite close).
Thunder Eggs can also be found, in two major locations in Australia, Germany, Poland, Romania, Ethiopia, Argentina, Mexico, Turkey, and one specific mountain in France. And most famously (according to google) you can find several different types of Thunder Eggs in the state of Oregon, US. Some of these ones are named by the ranch they were found in because they vary so much between locations there.
Anywho, here's my Thunder Egg as proof I think I know what I'm talking about 💜
With love from a fangirl and a rock nerd