Crystal Collecting

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Cave of Crystals: The  cavern in Mexico dubbed 'the Sistine Chapel of crystals'

Now that's a Geode!
Need a fairly decent display cabinet for that lot Aye.

G'day. Must be supermans home. Some little kid wants his toy figurine back. Hahaha.
Regards
Big fella

https://www.nationalgeographic.com/science/article/giant-crystal-cave-mexico-mystery-solved

The cave sits on a fault line and above a magma reservoir buried 2 to 3 miles (3 to 5 km) beneath Naica. Roughly 26 million years ago, magma rose from this chamber, forcing mineral-rich waters upward through cracks in the rock.

Stein-Erik Lauritzen (University of Bergen, Norway) performed uranium-thorium dating to determine the maximum age of the giant crystals, about 500,000 years. A team led by A. E. S. Van Driessche directly measured the growth rates of these giant gypsum crystals using present-day water of the Naica.

The caves are currently closed to tourists, as mining operations stopped and the underground cavern re-flooded with water. Conditions are returning to their undisturbed state, allowing the crystals to continue to grow.
Although the caves are closed, it is possible to see one of the crystals up close. In New York City, the Astro Gallery has a 32-inch Selenite crystal from the Naica on display.

And it's not out of the questions that the caves will reopen, seeing as some very special visitors with government or scientific connections have been known to gain access.
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Another geode:
https://www.science.org/content/article/how-world-s-largest-geode-grew-half-size-small-bedroom