Pliny the Elder, in his The Natural History, discusses emeralds in his chapter on smaragdus [emeralds], the Latin term for the green stone. Pliny mentions Egypt being the site for their mines   http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.02.0137%3Abook%3D37%3Achapter%3D16   Now we have evidence of an actual beryl mines in Egypt. Well-known beryl minerals include emeralds and aquamarine.    https://www.ancientpages.com/2021/04/