О саставу и обради племенитих метала из српских средњовјековних рудника
About The Composition And Processing Of Precious Metals From The Serbian Medieval Mines

Summary/Abstract: Account Books of the Caboga (Kabužić) Brothers 1426–1433 (Squarço – Reminder, Diary and Ledger) from the Historical Archive of Dubrovnik provide new evidence about the high degree of treatment and composition of precious metals from the Serbian medieval mines. First of all, that the residue, after the purifi cation of unprocessed into fi ne silver, was copper. Even the price of this process is listed. In the Squarço, in two items in a receipt from 1430, there is previously unknown data about auriferous silver (argento di glama), the composition of which, besides gold, also included copper, and the precisely determined shares of these metals per litre. Apart from the Account Books of the Caboga (Kabužić) Brothers, other written sources and hitherto geological explorations have provided no clues regarding the presence of copper in the auriferous silver mines.

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