Record ID: SWYOR-C0CDAC
Object type: SLAG
Broad period: UNKNOWN
County: Wakefield
Workflow stage: Awaiting validation
A piece of copper alloy casting waste, metal working debris or slag of unknown period, Bronze Age to Post-Medieval in date (about 2000 BC - AD 1800). In shape, the waste is an irregularly shaped mass which is also irregular in section. The surface is rough and granular. There are some black inclusions and a brown rounded pellet. The waste has a mid green mottled patina. Measurements; length 43.9mm, width 41.7mm, thickness 11.4mm, weight 47.0g.
Created on: Monday 8th January 2024
Last updated: Monday 15th April 2024
Spatial data recorded.

Record ID: SWYOR-B89422
Object type: SLAG
Broad period: UNKNOWN
County: Wakefield
Workflow stage: Awaiting validation
A large piece of iron tap slag of uncertain date, probably Roman to Post Medieval, about AD 43 - 1600. It is dense, magnetic and black to purple in colour with some rusty patches. It forms a thick plate which is rough and irregular on the lower face and sides, with characteristic runs of solidified molten metal across the top face. Both ends of the piece are broken. In cross-section it is D shaped. Measurements are; length 1694mm, width 1035mm, thickness 453mm. Tap-slag is slag that is 'tapped' from a bloomery furnace. This is carried out during smelting so as to allow the long c…
Created on: Monday 23rd May 2022
Last updated: Tuesday 21st June 2022
Spatial data recorded.

Record ID: SWYOR-9DB4FA
Object type: SLAG
Broad period: UNKNOWN
County: Calderdale
Workflow stage: Awaiting validation
A piece of possible slag or other industrial by-product such as dross, clinker, fuel ash, of unknown date, possibly Bronze Age to Modern, 2200 BC - AD 1900. It is a shiny light grey material, light in weight for its size, very soft (can be scratched with a finger nail), and it has a soapy feel. One face is irregular with many rounded particles, some of which are magnetic, and small holes. The other faces are smooth and fine grained, with conchoidal fractures. The piece is 41.3mm long, 33.3mm wide and 16.2mm thick. 14.5g.
Created on: Thursday 28th October 2021
Last updated: Wednesday 1st December 2021
Spatial data recorded.

Record ID: SWYOR-D1766C
Object type: SLAG
Broad period: UNKNOWN
County: Rotherham
Workflow stage: Awaiting validation
A piece of crystalline silver coloured metal, perhaps galena, lead ore or metallic slag, indicative of metalworking. The date is unknown. It is 42.8mm long, 26.9mm wide and 12.6mm thick. It weighs 39.94g. It is irregularly shaped, and has a crystalline, faceted surface, and is highly reflective. The facets are of different sizes.
Created on: Monday 2nd September 2019
Last updated: Thursday 18th March 2021
Spatial data recorded.

Record ID: SWYOR-206CE4
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A piece of slag, clinker or other similar industrial by-product of unknown date. It is smooth and soft, with one perfectly flat face and one more irregular. There are bubbles and cavities with grey material trapped inside the black. The object is not magnetic. It is 29.9mm long, 18.1mm wide and 7.7mm thick. 3.43g.
Created on: Tuesday 12th May 2015
Last updated: Wednesday 13th May 2015
Spatial data recorded.

Record ID: SWYOR-2049F6
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A piece of slag, clinker or other similar industrial by-product of unknown date. It is rough and irregular, with bubbles and cavities. It is a grey green colour with obvious shiny metallic particles. There are patches of orange deposits. The object is not magnetic. It is 82.4mm long, 62.4mm wide and 37.8mm thick. 216g.
Created on: Tuesday 12th May 2015
Last updated: Wednesday 13th May 2015
Spatial data recorded.

Record ID: SWYOR-4B57FC
Object type: SLAG
Broad period: UNKNOWN
County: Lincolnshire
Workflow stage: Awaiting validation
A piece of slag, clinker or other by-product of industry or burning of unknown date. It has a low mass for its size, and where the internal structure is visible, it is grey, hard and made up of small bubbles. It is 82.3mm long, 67.4mm wide and 35.7mm thick. 63.5g.
Created on: Wednesday 20th August 2014
Last updated: Wednesday 20th August 2014
Spatial data recorded.

Record ID: SWYOR-FA48D1
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A tiny fragment of slag, clincker or similar industrial by-product. Its structure is bubbly and vesicular and it has a light density. It is dark grey.
Created on: Thursday 17th April 2014
Last updated: Sunday 19th May 2019
Spatial data recorded.

Record ID: SWYOR-E67333
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Three pieces of slag, clinker or other similar industrial by-product. The pieces are rough and irregular, and of light density. They are dark grey or black, and lustrous in places. They do not respond to a magnet.
Created on: Wednesday 16th April 2014
Last updated: Thursday 1st May 2014
Spatial data recorded.

Record ID: SWYOR-D527D3
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Two pieces of slag, clinker or other similar industrial by-product. The pieces are rough and irregular, with bubbles and cavities. One has a low density and is grey with some undulating dark grey layers and some areas of orange colouration. The other is low in mass but glassy with conchoidal fractures. There is a lump of orange stone on one face, and a shiny, purple layer on the other face, with the rets being a dark grye to black colour. Both react to a magnet.
Created on: Tuesday 15th April 2014
Last updated: Thursday 1st May 2014
Spatial data recorded.

Record ID: SWYOR-D3C971
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Three pieces of slag, clinker or other similar industrial by-product. The pieces are rough and irregular, with bubbles and cavities, and have a low density. Two are a grey green colour with obvious metallic particles. The other is orange, even less dense, and some patches of metal deposit. All three react faintly to a magnet.
Created on: Tuesday 15th April 2014
Last updated: Thursday 1st May 2014
Spatial data recorded.

Record ID: SWYOR-6A9677
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Five pieces of slag or clinker like material of unknown date. The material is probably an industrial by-product. It is dark grey to black, some pieces are reflective, and often appearing laminated. It is often unusually light in weight for its size.
Created on: Thursday 10th April 2014
Last updated: Sunday 3rd May 2020
Spatial data recorded.

Record ID: SWYOR-858DB8
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Seven pieces of slag or industrial waste products of unknown date.
Created on: Friday 13th April 2012
Last updated: Saturday 23rd May 2020
Spatial data recorded.

Record ID: SWYOR-850948
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
Two pieces of industrial waste, one is tap slag and the other is ferrous with an embedded lump of another material. Date unknown.
Created on: Friday 13th April 2012
Last updated: Saturday 23rd May 2020
Spatial data recorded.

Record ID: SWYOR-CA5814
Object type: SLAG
Broad period: UNKNOWN
County: Lincolnshire
Workflow stage: Awaiting validation
Three pieces of metalworking slag; waste material from metal working. It reacts slightly to a magnet. Most of the surfaces are rough, blistered and black with some orange throughout. A portion of the large piece is dark grey and slightly "blobby" where the liquid material has solidified in drops and layers. Parts of this billowed material have a dull shine. Together, the pieces weigh 61.84 grams.
Created on: Tuesday 28th February 2012
Last updated: Tuesday 28th February 2012
Spatial data recorded.

Record ID: SWYOR-3745E8
Object type: SLAG
Broad period: POST MEDIEVAL
County: Derbyshire
Workflow stage: Awaiting validation
A piece of metalworking slag of unknown date. Light-weight, magnetised and slightly convex piece of slag, possibly part of a crucible, or maybe cinder slag. The material is pale grey in the centre; one surface is blackened and the other surface is dark brown in colour; it has a rough and pitted surface, glossy in places, with a purple sheen. Compare NSC Box 008 and NSC Box 032C in the National Slag Collection. Slag is very difficult to date but it is important as evidence of metalworking. This is likely to be Post Medieval to Modern in date. Length: 38.1mm; Width: 50.6mm; Thickness:…
Created on: Tuesday 21st February 2012
Last updated: Friday 24th February 2012
Spatial data recorded.

Record ID: SWYOR-26DAE7
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A piece of tap slag of uncertain date from Roman to Post Medieval. It is dense, magnetic and black to purple in colour. It forms a thick plate which is rough and irregular on the lower face, with characteristic runs of solidified molten metal across the top face. This piece is just one small example of the many pieces recovered from the same place. Tap-slag is slag that is 'tapped' from a bloomery furnace. This is carried out during smelting so as to allow the long continuance of the operation. It cools to a solid slag with marked flow lines. There were fewer bloomeries after the…
Created on: Monday 20th February 2012
Last updated: Sunday 24th May 2020
Spatial data recorded.

Record ID: SWYOR-00ED64
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A piece of slag; waste material from metal working. It has a dull stone like surface, but has been cut in half since recovery to reveal the internal structure which is closely packed bubbles, varying in size in a dark grey glassy material. Some bubbles can be seen on the outer face. The object reacts faintly to a magnet.
Created on: Friday 13th January 2012
Last updated: Tuesday 26th May 2020
Spatial data recorded.

Record ID: SWYOR-0087A2
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A piece of slag; waste material from metal working. It is an odd shape; oval in section with broken ends revealing the bubbly, glassy black internal appearance. The surface is dull and purple with pitting in places. The object reacts to a magnet. The whole is shaped rather like a rim sherd of pottery.
Created on: Friday 13th January 2012
Last updated: Tuesday 26th May 2020
Spatial data recorded.

Record ID: SWYOR-F0FF54
Object type: SLAG
Broad period: UNKNOWN
County: Doncaster
Workflow stage: Awaiting validation
A large piece of slag; waste material from metal working. It reacts slightly to a magnet. Parts of the surface are rough, blistered and orange. The rest is dark grey and "blobby" where the liquid material has solidified in drops and layers. Parts of this billowed material are shiny.
Created on: Thursday 12th January 2012
Last updated: Tuesday 26th May 2020
Spatial data recorded.