Bornite, also known as Peacock ore, is a mineral that tarnishes to different colors, ranging from blue, yellow and purple. This is the first sample of it I have found locally, right in my local shale pile. I have a feeling that I will be finding more of it nowRead More →

Aragonite Shell Material

The very definition of a fossil includes objects that have been replaced by another material. These are called casts. Impressions are also fossils, such as the shape of a prehistoric fern leaf embedded in shale rock or the impression of a shell in limestone. Somewhat common in Western Pennsylvanian fossilsRead More →