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.
Pretty sea-green prehnites pseudomorphing laumontite stems from the famous Malad quarries near Bombay. Snow-white girolite spheres accompanied by some glassy, colorless, elongated pseudocubic apophyllite crystals.
Intense ruby-red crystals appear in many of the samples. Some of these crystals are larger than a centimeter. This sample is more than 100 years old since it was collected