Bou Azzer District, Drâa-Tafilalet Region, Morocco

Description

A saturated and highly dimensional cabinet specimen featuring vivid magenta cobaltoan calcite crystals lining a mineralized cavity within a manganese-rich matrix.

The interior is densely coated in sparkling microcrystalline calcite, creating a granular, almost velvety magenta surface. Rising from this bed are several larger, more translucent calcite crystal blades that catch the light beautifully.

Scattered across the cavity walls are soft green malachite botryoidal formations, adding a matte, earthy contrast to the brilliant cobalt-pink calcite. The interplay between glossy crystalline surfaces and velvety malachite texture gives the specimen strong visual movement and depth.

The matrix provides dramatic framing, allowing the color contrast to fully stand out. This is a bold, expressive Bou Azzer piece with excellent mineral association.

Dimensions & Weight

3.5” x 3” x 2”
650 grams

Collector’s Notes

This specimen offers both visual impact and mineralogical credibility — not just color, but paragenesis.

Bou Azzer is one of the world’s most important and  historic cobalt mining districts. The region’s hydrothermal systems produced a complex suite of cobalt, copper, and manganese minerals — and this specimen clearly reflects that geological story.

The formation sequence visible here includes:

• Manganese-rich host rock
• Cobalt-bearing calcite crystallization
• Later-stage copper alteration forming malachite

The intensity of the calcite’s magenta coloration indicates strong cobalt substitution within the lattice. Well-saturated examples with attractive malachite contrast and intact crystals are consistently favored by collectors.

Highlights

• Intense magenta cobaltoan calcite
• Associated botryoidal malachite
• Manganese-rich contrasting matrix
• Highly collaborative 
• Strong cabinet-scale presence
• Classic Bou Azzer material

Mineralogy

Cobaltoan calcite is a cobalt-bearing variety of calcite in which cobalt substitutes for calcium, producing vibrant pink to deep magenta coloration.

Malachite is a secondary copper carbonate mineral formed during the oxidation of copper-bearing fluids. Its presence here indicates later alteration within the hydrothermal system.

The dark areas within the matrix are consistent with manganese oxides typical of Bou Azzer ore bodies.

The specimen represents a multistage mineralizing environment — cobalt-rich fluids followed by copper-bearing alteration phases within a manganese host.