So I picked this rock up off the side of our road because it had a great blue green color to it. Unfortunately, it's too big for my saw, but I managed to get a piece off of it and put a bit of polish on a face. The rock seems to be composed of a variety of small crystals, that seem somewhat fibrous and are oriented in different directions. Overall, the rock is about a 4.5 Mohs, though there is some variation based on which part is scratched.. It's got some nice color, and catches the sunlight will with all the different crystal faces. The pictures below are close ups of about a one inch piece. The real close up is taken through a 9x field microscope to show the crystal and mineral structure. The squarish crystals are much harder than the light green mineral. In the second picture you can see that the polished face shows some differential acceptance of the polish.
The rock seems to have potential to me. Any ideas what it is or how best to get the best outcome with it? Would a picture of the whole rock be helpful?
