Hacksilver, or Hack-silver, is fragments of cut and bent silver items treated as bullion, either for ease of carrying before melting down for re-use, or simply used as currency by weight. It was common among the Norsemen or Vikings, as a result of both their raiding and trade. The modern Russian currency the "ruble" is derived from the Russian verb рубить, rubit, i.e., to chop, from the practice of the Rus, described by Ahmad ibn Fadlan visiting the Volga Vikings in 922. An example of the related Viking weighing scale with weights was found on the Isle of Gigha. Hacksilver may be derived from silver tableware, Roman or Byzantine, church plate and silver objects such as reliquaries or book-covers, and jewellery from a range of areas. Hoards may typically include a mixture of hacksilver, coins, ingots and complete small pieces of jewellery.
- The 4th or 5th century hoard of Traprain Law (Traprain Treasure) consists of four silver coins and over 53 pounds of sliced-up Late Roman silver tableware, much of it of very high quality. Whether this was handed over by Romans to the Pictish occupants of the site, or the products of raids on Roman Britain, is unclear.
- The Vale of York hoard includes over 617 silver coins and hacksilver.
- The Skaill Hoard, the largest Viking Age silver hoard found in Scotland, consists of over 100 items, including jewelry, a few coins and assorted hacksilver. The hoard, dated to between 950 and 970, was found in Skaill, Sandwick, Orkney, in 1858.
- The main Penrith Hoard is of Viking-period penannular brooches, but a separate hoard found very close by includes many pieces of hacksilver.
- Graham-Campbell, James; Batey, Colleen E. (1998). Vikings in Scotland: An Archaeological Survey. Edinburgh University Press. p. 243. ISBN 0-7486-0641-6.
- James Graham-Campbell: The Viking-age silver and gold hoards of Scandinavian character from Scotland
- M. Bogucki: Reasons for hiding Viking Age hack silver hoards
- Hacksilver in the database of the National Museums of Scotland
- Hacksilver in the database of the British Museum
- Viking weights
- Graham-Campbell, J A (1975–76). "The Viking-age silver and gold hoards of Scandinavian character from Scotland". Proceedings of the Society of Antiquaries of Scotland 107: 114–135.