Carbonate Mineral Specimens and Products

Azurite with Malachite & Chalcopyrite

#50337

Availability: Available
Price: $30.00

Locality: Cornriggs Vein, Cross Fell, Cumbria, England
Formula: Cu₃(CO₃)₂(OH)₂
Size: 5.5 x 5 x 4 cm - Sm Cabinet
Tagged: carbonate, copper

A nice chunk of Chalcopyrite with alterations to Azurite and Malachite.

Azurite at Dakota Matrix Azurite at WebMineral Azurite at MinDat

Calcite

#PD49218

Availability: Available
Price: $40.00

Featured: Featured in Special Editions
Locality: Tsumeb mine, Tsumeb, Namibia
Formula: CaCO₃
Size: 12.5 x 5.5 x 6 cm - Cabinet
Tagged: carbonate

White interesting formation of at least two generations of Calcite, perhaps as a cast of a former mineral.

Calcite at Dakota Matrix Calcite at WebMineral Calcite at MinDat

Hydromagnesite var. idrogiobertite

#PD49847

Availability: Available
Price: $95.00

Featured: Featured in Special Editions
Locality: Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy
Formula: Mg₅(CO₃)₄(OH)₂·4H₂O
Size: 5.5 x 2 x 2 cm - Sm Cabinet
Tagged: carbonate
Special Info: Antique Specimen

This is the variety of Hydromagnesite, idogiobertite, a hydrous carbonate of magnesia. The vial is an antique specimen labeled 1906 and filled with the powder of this mineral. An early reference to this variety can be found in J. Logan Lobley's "Mount Vesuvius". Here Lobley describes the mineral as rare and found enclosed in a large fragment of ancient lava...."Eugenio Scacchi gives it the name Idrogiobertite" (from Vesuvius). Dana (6th Ed) states this variety was named by Scacchi on Dec. 12, 1885. Very few specimes out there would have this varietal name placed upon the specimen. Rather most will call it the proper defined name as "Hydrmagnesite".

Hydromagnesite at Dakota Matrix Hydromagnesite at WebMineral Hydromagnesite at MinDat