#70597, Acanthite, San Juan de Rayas Mine, Mexico (t) $35

#75335, Stannite, Yaogangxian Mine, China (t) $115

#75249, Bournonite, Yaogangxian Mine, China (m) $375

#75521, Bournonite (twinned crystals), Yaogangxian Mine, China (t) $185

#73762, Acanthite, San Juan de Rayas Mine, Mexico (t) $85

#75363, Bournonite, Yaogangxian Mine, China (t) $75

#73402, Quartz on Bournonite with Chalcopyrite and Jamesonite-Boulangerite, Yaogangxian Mine, China (m) $145

#73968, Pyrite over Hematite, Miniera di Rio Marina, Isola d'Elba, Italy (m) $115

#75332, Acanthite, Mina la Sirena, Mexico (t) $115

#75523, Bournonite (complexly twinned crystals), Yaogangxian Mine, China (t) $215

#75525, Bournonite (twinned crystals), Yaogangxian Mine, China (t) $365

#72799, Galena, Quartz, Calcite, Sphalerite, Herja Mine, Baia Mare, Romania (c) $95

#76389, Pyrite, Eagle Mine, Gilman District, Colorado (c) $55

#75522, Bournonite (twinned crystals), Yaogangxian Mine, China (t) $150

#73758, Bournonite (cyclic twinned crystals), Yaogangxian Mine, China (t) $135

#75524, Bournonite (twinned crystals), Yaogangxian Mine, China (t) $155

#75331, Acanthite, Xiaoqinggou, China (t) $30

#75527, Bournonite (complexly twinned crystals), Yaogangxian Mine, China (m) $225

#75044, Bournonite (tabular doubly-terminated twinned crystals), Yaogangxian Mine, China (t) $145

#75519, Bournonite, Yaogangxian Mine, China (t) $110

#75935, Galena (Spinel Law-twinned), Sphalerite, Calcite (twinned), Chalcopyrite, Dalnegorsk, Russia (c) $175

#75644, Pyrite with Chalcocite partial coating, Milpillas Mine, Mexico (t) $25

#77189, Galena with complex crystallization patterns, Brushy Creek Mine, Missouri (m) $150

#75614, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (c) $48

#75497, Bournonite (complexly twinned crystals) on Quartz, Yaogangxian Mine, China (m) $275

#77714, Realgar, No. 5 Mine, Baia Sprie (Felsöbánya), Romania (c) $3500

#77330, Pyrargyrite (unusually large crystal), San José Mine, Mexico (t) $425

#75528, Bournonite (twinned crystals), Yaogangxian Mine, China (m) $415

#73319, Pyrite and Calcite, Bull's Ferry Road condominium construction site, New Jersey (lc) $325

#78480, Chalcocite pseudomorphs after Covellite with Enargite, Pyrite and Quartz, Butte District, Montana (c) $400

The chalcocite below, from Chimney Rock Quarry, is from my private collection

This chalcocite from the Chimney Rock Quarry is an important museum-quality mineral specimen that I acquired for my private collection many years ago. To the best of my knowledge, this is the largest and finest chalcocite specimen every collected at Chimney Rock. This quarry has not been accessible to collectors for the last 25+ years. Chalcocite, a rare mineral in New Jersey trap rock quarries, occurs at the boundary of two rock formations, where copper-rich solutions encounter impermeable layers above, causing copper minerals to precipitate, followed by late-forming calcite.

The ONLY reason I am selling this specimen is that it is too large for my display case.

I highly recommend this, without reservation, for collectors of top-quality minerals.

#73189, Chalcocite with Chrysocolla embedded in Calcite vein, Chimney Rock Quarry, Bound Brook, New Jersey (lc) $3500

#75670, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $65

#75765, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $22

#75665, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (c) $65

#75761, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $40

#75667, Pyrite with Chalcocite coating in Quartz, Milpillas Mine, Mexico (m) $45

#75756, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (c) $45

#75662, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $36

#75663, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $30

#75757, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $38

#75760, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $12

#75676, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (c) $45

#75675, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (c) $75

#75763, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $25

#75677, Pyrite with Chalcocite coating, Milpillas Mine, Mexico (m) $55

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