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Description: | A late Iron Age copper alloy brooch (200BC ? 100AD). It is a Hull & Hawkes (1987) Type 2B variant dating to La Tene II. The brooch is flat (thickness 3.34mm) and decorated with four circular elements in openwork, forming a lozengiform shape. The four circular elements are interconnected with five rounded ?beads?. The circular elements each have a central circular depression/pit that has a highly polished appearance contrasting with the matt dark green patina on the rest of the brooch. The circular element that would have the catch-plate on the reverse has a circular perforation at the base of the central depression/pit. Around each of the circular depressions is a circular groove. The reverse has twin lugs with iron corrosion (the remains of the spring) between them. The pin and the catchplate are missing.
Dana Goodburn Brown is currently researching burnished similar to the polishing in the four circular depressions/pits on this brooch. Dana states that the difference in patina between the pits and the surface of the brooch may be due to the burnishing effect compacting the surface in such a way as to produce a different corrosion effect from the outer ?as cast? surface. Dana continues ? alternatively a lubricant may have been used during the drilling/burnishing of the pits and this produced a different patina. This brooch needs a closer look, and more analysis to confirm, but Dana has noticed strange corrosion effects associated with burnishing/mechanical polishing on other artefacts.
Dimensions: length 37.32mm; width 25.62mm; thickness: 6.02mm; weight 9.43g
Hull, M. R. and Hawkes, C. F. C. 1987. Corpus of Ancient Brooches in Britain. BAR British Series 168.
Identified by Dr J. D. Hill of The British Museum. | Format: | text/html | License: | http://creativecommons.org/licenses/by-sa/3.0/ | Publisher: | The Portable Antiquities Scheme | Rights holder: | The Portable Antiquities Scheme | Subjects: | archaeology | Temporal: | -200
100 | Source: | Portable Antiquities | Identifier: | http://www.finds.org.uk/database/artefac... | Language: | en-GB | Format: | text/html | Go to resource |
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