Ellis, C., Bertini, M. and Sykes, D. (2023). Supplementary material: The production of a glass toggle: Iron Age craft specialisation along Scotland's western seaboard. Proceedings of the Society of Antiquaries of Scotland 152. Vol 152, Edinburgh: Society of Antiquaries of Scotland. pp. 110-110. https://doi.org/10.5284/1118588. Cite this via datacite

Title The title of the publication or report Title:	Supplementary material: The production of a glass toggle: Iron Age craft specialisation along Scotland's western seaboard
Issue The name of the volume or issue Issue:	Proceedings of the Society of Antiquaries of Scotland 152
Series The series the publication or report is included in Series:	Proceedings of the Society of Antiquaries of Scotland
Volume Volume number and part Volume:	152
Page Start/End The start and end page numbers. Page Start/End:	110
Downloads Any files associated with the publication or report that can be downloaded from the ADS Downloads:	4_PSAS_152_p1-3_SM.pdf (99 kB) : Available for download from 30-Nov-2025
Licence Type ADS, CC-BY 4.0 or CC-BY 4.0 NC. Licence Type:	ADS Terms of Use and Access
DOI The DOI (digital object identifier) for the publication or report. DOI	https://doi.org/10.5284/1118588
Publication Type The type of publication - report, monograph, journal article or chapter from a book Publication Type:	Journal
Abstract The abstract describing the content of the publication or report Abstract:	A glass toggle was found among the ashes of a domestic hearth during the excavation of an unenclosed Iron Age settlement at Kilninian, Isle of Mull, Argyll, Scotland. The hearth was radiocarbon dated to 168 cal bc–cal ad 3 (SUERC-46765). The toggle was covered with a black residue that was stuck to its surface and it looked hastily made, using low-quality aqua cullet. Chemical analyses, using LA-ICP-MS, indicate the glass used was a natron-based glass. The trace element composition suggested the glass was produced in the east Mediterranean area using coastal sands and had subsequently been recycled. The morphological examination using extended depth of field microscopy and micro-computed tomography revealed the toggle was shaped at low temperatures using contaminated glass. The black sooty residue found on the surface of the toggle was found to extend within the toggle and was fused with the object. This could only have happened during manufacture, when the glass was still hot enough to be malleable and stick to the contamination. The uncleaned residues on the surface and the presence of the unpolished pontil scar suggest the toggle may have fallen in the hearth during manufacture and was lost to its maker. Analyses of other glass toggles found in Scotland and Ireland confirmed that natron-based glass had also been used and the toggles were made in the same way as that from Kilninian.
Author The authors of this publication or report Author:	Clare Ellis Martina Bertini Dan Sykes
Publisher The publisher of the publication or report Publisher:	Society of Antiquaries of Scotland
Year of Publication The year the book, article or report was published Year of Publication:	2023
Locations Any locations covered by the publication or report. This is not the place the book or report was published. Subjects / Periods:	Iron Age western Scotland glass bead LA-ICP-MS micro-computed-tomography extended field of view microscopy
Source Where the record has come from or which dataset it was orginally included in. Source:	ADS Archive (ADS Archive)
Relations Other resources which are relevant to this publication or report Relations:
Created Date The date the record of the pubication was first entered Created Date:	12 Apr 2024