History · Geology
About Erongo Mountains
The Erongo Mountains in central-western Namibia are the country’s premier pegmatite/miarolitic-cavity gem-mineral locality, producing world-class aquamarine, schorl, jeremejevite, hyalite opal, and a diverse zeolite suite. Active mining of collector specimens began in the 1990s.
Geology
The Erongo complex is a Cretaceous granitic ring intrusion (~130 Ma) with miarolitic cavities and miarolitic pegmatite zones rich in late-stage volatile-charged fluids. The granite host is the Erongo Granite.
Notable Minerals
Aquamarine (sky-blue prismatic crystals to 30 cm, perched on schorl/quartz/feldspar matrix — iconic), black schorl (often with aquamarine), jeremejevite (rare aluminoborate), hyalite opal (vivid green UV fluorescence), fluorite, quartz, tourmaline (multicolor elbaite-schorl).
Collector Notes
Erongo aquamarine matrix specimens are the global gold standard for the species. Pair with Xuebaoding (Sichuan) for the world’s premier aquamarine collector display.
