Small pegmatite bodies, containing ordinary beryl, some aquamarine and tantalo-niobates, are located in and near the contacts of the schists with gneisses. The emerald
deposits are also in the contact zone in the western and eastern parts of the block, where ultramafic biotite-phlogopite and actinolite (tremolite)-talc-chlorite rocks are found within the greenstone sequence.
Ref: E.Ya. Kievlenko (2003) Geology of gems, p. 93
Gem list contains entries from all listed localities in region.
Localities in this Region