Na niektórych okazach z sycylijskich złóż siarki można czasem znaleźć przezroczyste, twarde kropelki. Trochę jakby ktoś zachlapał okaz klejem. Całkiem nietypowo, jak na minerały. A jednak. Między innymi w takiej formie występuje dziwaczny minerał z wielkiej rodziny SiO₂ - melanoflogit.

Everyone's heard of a zipper (no, it's not the super-fast building with towers), but have you heard of a lightning bolt? Probably not, because that name just popped into our heads when we decided to tell you about fulgurites (fulgurite is actually the common name in science).

It is one of the most famous iron meteorites found on Earth. It is believed to have struck our planet's surface around 4,000 years ago, but was likely formed around 4.5 billion years ago, during the formation of the protoplanetary disk!

Ruby at night, emerald by day...
At the turn of the 18th and 19th centuries, expeditions were constantly setting off to the Urals to search for natural resources. It was during one such expedition, in 1832, that one of the researchers found gray-green crystals.

The Permian is the last geological period of the Paleozoic era, following the Carboniferous and ending about 252 million years ago with the largest extinction in Earth's history. It was a time when many amphibians lived, whose body shape would more closely resemble reptiles such as lizards or crocodiles than most amphibians today.