For years, I've been looking at this stone which I collected off the shoreline of the West River, up towards Williamsville. I've not been able to figure out what it is. Do any of our amateur (or professional) geologists know?
Although not obvious from this photo, the stone has a strong blue-green cast and is crystalline in nature. The broken area at the top shows the crystal form somewhat, if you look closely. There are a lot of stones of this type in the river around the area where I found this one, and I thought now would be as good a time as any to enlist the expertise of the community to finally identify it.