Weathered flakes of biotite which can sport a bright yellow color and a nice flash of light when viewed just right, have also been mistaken for gold. Gold specimens are sometimes artisticly stunning and a good investment as well. After all, it is gold , which never seems to lose its value. Good natural specimens though are more expensive than their actual weight value. Luster is metallic.
Transparency is opaque.
Also wires, dendritic and arborescent crystal clusters. Cleavage is absent. Fracture is jagged. Streak is golden yellow. Associated Minerals include quartz , nagyagite , calaverite , sylvanite , krennerite , pyrite and other sulfides .