Chrysocolla beads are an interesting variety of copper minerals that do not occur in nature. All specimens are the result of the "flux process". Chrysocolla is made when heat and pressure turn copper ore into malachite, but high levels of various trace elements in the local environment turn the mineral green. These rare variants are called "chrysocolla." The particular shade varies depending on where it's found, but they're always a little lighter than malachite that was not subject to this fluxing process.