COBALTAUSTINITE on Calcite
Unknown Owner
Cobaltaustinite is a rare secondary calcium cobalt arsenate hydroxide mineral that forms a series with the zinc analogue - Austinite. This specimen was previously labelled as Cobaltoan Austinite - a cobalt-rich variety of Austinite - but most material of this appearance from the Bou Azzer Mining District falls into the domain of Cobaltaustinite. It is a very rich, and large, display quality specimen, with crystal-lined cavities within Calcite coated with finely botryoidal crusts - some quite thick - of matt, leaf-green, to darker green Cobaltaustinite. At one end of the main cavity sparkling uncoated small prismatic Calcite crystal dominate with a fairly rapid transition across the cavity to Calcite crystals entirely covered with Cobaltaustinite. Ex Nick Hawes collection.
Product details
Species
SizeCabinet
Dimensions13.4 x 10.2 x 7.8 cm
Added on05/20/2026
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 05/2026 | Unknown Owner | $1,000.00 |
| — | Crystal Classics | Not disclosed |
Learn more
Mineral guide
Learn about Calcite
diverse shapes, colors, and optical quirks; widely available yet scarce elite pieces from Elmwood and Charcas drive collecting value and display.
Regional guide
Comments