Found only in Michigan, mohawkite is a combination of copper arsenates with cobalt, iron, and silver set in a white quartz base that makes extremely stunning jewelry. The two slabs (photographed wet) weigh 6.4 ounces. The larger one measures 4" X 3 3/4" at its widest points and is 8mm thick. The smaller slab measures 2" X 2 1/2" X 7.25mm thick. (The cabochon is not included in this auction but serves only as a finished example of this material.) Yes, we do combined shipping.