It is 1908, and one of the fathers of Sardinian geology, Domenico Lovisato, analyzing minerals from the Rosas Mine, came across a specimen that was very unusual in structure, color and characteristics. After several analyses, he found that he had a mineral on his hands that was hitherto unknown to science. It was an ore consisting essentially of copper and zinc to which he gave the name rosasite, in honor of the Rosas mine, the site of the discovery. Later, the species was found in other copper deposits scattered around the world, but the authorship of the discovery remains and will remain all Sardinian. Currently, the sample analyzed by Lovisato is in the collections of the Museum of Natural History in Paris. In the showcases of the mineralogical museum, however, you can see splendid samples of rosasite extracted over the years. And the discoveries did not end there...