Chalcopyrite, Sphalerite, Pyrite, Quartz Specimen (7” x 4”) citrine Beryllonite is a rare sodium

Beryllonite is a rare sodium beryllium phospate mineral

which result in complex crystal lattice substitutions

The stone aids clearer communication

Siderite specimens are of interest to mineral collectors

Chalcopyrite, Sphalerite, Pyrite, Quartz Specimen (7” x 4”) citrine Beryllonite is a rare sodiumThis spectacular specimen comes to us from the Madan Ore Field Rhodope Mountains, Smolyan Oblast Bulgaria. This specimen is a rare combination of Chalcopyrite, Sphalerite, Pyrite, Quartz that displays black and white crystal clusters. Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. Chalcopyrite is known to have a brassy to golden yellow color and a hardness of 3. 5 to 4 on the Mohs scale. Chalcopyrite is