When Rome Ruled Egypt TV - $400 Million Emerald Mystery TV -
No-one knows exactly how many emeralds were mined here. But it must have been millions. The mountain is honeycombed with thousands of mine-shafts. When Rome Ruled Egypt, National Geographic 2008
The finest green gems are mined in Colombia: Muzo. $400 Million Emerald Mystery, National Geographic 2012
Size matters in the emerald business. ibid.
The Bahia Emerald ... Five parties claim ownership. ibid.