Rosasite is a carbonate mineral with minor potential for use as a zinc and copper ore.

Chemically, it is a copper zinc carbonate hydroxide with a copper to zinc ratio of 3:2, occurring in the secondary oxidation zone of copper-zinc deposits.

It was originally discovered in 1908 in the Rosas mine in Sardinia, Italy, and is named after the location.

Fibrous blue-green rosasite crystals are usually found in globular aggregates, often associated with red limonite and other colorful minerals.

This article about a specific carbonate mineral is a stub.