Nikolaevskiy Mine, Dal'negorsk B deposit, Dal'negorsk, Primorskiy Kray, Far-Eastern Region, Russia
Beige colored spherical aggregates of Siderite with associated twinned Calcite and cubic Pyrite. The largest aggregate of Siderite is hollow on the underside and filled with Calcite crystals. Areas of the Pyrite have an attractive reddish tarnish.
The specimen is in very good condition with no appreciable damage.