Azurite crystals replaced by malachite cover a large part of the sample, in association with other carbonates and sulfates, such as cerussite, caledonite, etc.
Native copper branches make up the entire sample, which is covered in some areas by cuprite and also hematite. Very well-defined crystals of intense color can be seen.
A very nice specimen with good crystallization. Exhibiting a branching or dendritic pattern, this splendid, large cabinet native copper specimen from the famous Copper District of Upper Michigan.
Metallic sheet of Native Silver on matrix with minor Luanheite . This is one of the good examples that I keep because in 1998, the entrance to the mine collapse. Impresses be a single large sheet of luanheite, which exceeds the size of the matrix.