This find was made a couple of years back in China (2007), and is absolutely unique: glittery, golden pyrite microcrystals on the edges of large (to 5.0 cm across on this piece) flattened rhombs of lustrous, translucent calcite. Some of the specimens had very sparse coverage of pyrite, just a salting, but here, it is richly carpeting the crystal edges.
Known provenanceKnowing where your specimen comes from and who owned it adds to its story and value. Good provenance helps prove it's authentic and preserves important details about its discovery.