An open gap in Calcite offers enough space for the growth of Quartz crystals and another pleochroic (different color, black or brown, depending of crystal position) mineral. We acquired the sample thinking it could be something very rare, a sulfide or a cobalt arsenate... As usually happens, the analysis send us back to reality: They are Goethite crystals. Beautiful, very unusual for the locality, but Goethite. Arhbar, Bou-Azzer area Morocco Found in 2003 Specimen size: 8.5 x 5.2 x 3.3 cm
Arhbar, Bou-Azzer area Morocco
Found in 2003
Specimen size: 8.5 x 5.2 x 3.3 cm
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