The data in general are gemstones consumed in Roman markets and featured in book 37 of Pliny's Natural History. The data are the result of cleaning processes of the data. These cleaned and processed data have served to elaborate the graphs of networks of precious stones in the Roman Empire, according to the vision of Pliny the Elder

Files in .gdf / .gephi (which can be read by GEPHI) to obtain the representation of a network where meeting places of objects are associated with their places of origin. The Python program represents the network for a given time interval. The mission of this text is to make the routines easy for an unfamiliar user. Databases usually require a standardization before being able to run a program on them, since the program has been programmed to receive the data in a specific way. The objective of the program is to filter certain years from a given database and generate the network between stamps and discovery sites. The program in question is called network-provinces.py and is written in Python 2.7.

NOMENCLATURE: In file JPG Gems Vistorian Figures 1-2 EG = Egypt ALL = all In file JPG Gems Vistorian Figures 3-4 BLN = Berlin Museum JPGM = J. Paul Getty Museum XTN= Colonia Ulpia Traiana (Xanten) BOL= The Archaeological Civic Museum of Bologna VNZ = Venice National Archaeological Museum LNI = Luni UDN = Udine Museum VLC = University of Valencia GAU = Gaul BAR = Bari Museum

FILES: - JPG Gems Vistorian Figures 1-2 - JPG Gems Vistorian Figures 3-4 - GEMAS procedencia tabla - gemmes.gdf - gemmes.png - Gems.py - io_functions.py