Emerald occurrence, associated with a desilicified pegmatite vein that follows the contact between biotite gneiss and talc schist. Emeralds are concentrated in plagioclase-rich parts of the pegmatite and in contacts with phlogopite-rich zones.
Ref.:
- Groat, L.A., Giuliani, G., Marshall, D.D., and Turner, D. (2008): Emerald deposits and occurrences: A review. Ore Geology Reviews 34, 87-112.