Archive · 18 Jul 2025
Rare Mineral Rediscovered After 75 Years Thanks to Letter
Imagine someone found an old letter from 75 years ago, which led them to discover a super rare mineral called humboldtine.
This mineral is like a tiny, lemon-yellow rock found in very few places.
It's special because it's made of iron and a type of acid, and it can help move electricity.
Scientists are excited because this could be used in the future to make better batteries for things like phones and cars.
The discovery also shows that looking at old documents can lead to exciting new finds.
A 75-year-old letter led to the rediscovery of humboldtine, a rare mineral.
The letter was found in a German government archive during a digitization project.
Humboldtine is an organic mineral, found in only 30 locations globally.
The discovered fragments are hazelnut-sized, larger than typical grains.
Humboldtine's composition is drawing interest for potential green technology uses.
- Who
- Roland Eichhorn of the Bavarian State Office for the Environment.
- What
- Rediscovery of humboldtine, a rare mineral.
- When
- The rediscovery happened after a 2023 digitization project.
- Where
- Bavaria, Germany.
- Why
- The discovery highlights the importance of historical records and potential uses of the mineral.
- Mineral Name
- Humboldtine
- Discovery Source
- 75-year-old letter
- Location of Discovery
- Bavaria, Germany
- Primary Investigator
- Roland Eichhorn
- Mineral Composition
- Iron oxalate
- Potential Applications
- Green technologies, batteries