The hardness of my fossil is over a 5 on the hardness scale because it does cut glass. It's so heavy just for a small chunk, has shale like layers, sorta chalky, and has the most remarkable glittery dust of green copper red gold blue sparkles to it but very small it's best to use a magnifier to get good close up look. It's black in some areas as if it we're magma or from lava flow. What is the glittery part in fossils?