I’ve become a fan of Nick Zentner on YouTube, he’s a geology professor at Central Washington University. Your part of the world has an interesting story to tell, from the Australian continent being attached to Montana some billion years ago, to the accretion of large igneous provinces formed a thousand miles or more away from where they now sit. He has videos on identifying minerals and rocks posted on YouTube. It is useful to also study the surrounding rocks, was this something covered in a lave flow, or a pyroclastic flow? I am only a novice and live a world away, most of the rock here is sedimentary, except for the igneous rock carried here by the glaciers.