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A mineralogical trip through the regions of the UK - Wales
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James Catmur
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PostPosted: Jun 07, 2013 05:00    Post subject: A mineralogical trip through the regions of the UK - Wales  



I used to collect here as a very small child but that was in the slate quarries around Blaenau Ffestiniog and the area around Garreg and Penrhyndeudraeth. I sadly never went to Prenteg as a child. More recently I have tried my luck in the gold mines above Afon Mawddach (with no luck)

I use a fine Linarite already published by Ploum here to get us started



Linarita - Eaglebrook Mine_Talybont_Ceulanymaesmawr_Ceredigion_Wales_UK.jpg
 Description:
Linarite
Eaglebrook Mine, Talybont, Ceulanymaesmawr, Ceredigion, Wales, UK
fov 1.5 mm
Photo: Ploum
 Viewed:  25461 Time(s)

Linarita - Eaglebrook Mine_Talybont_Ceulanymaesmawr_Ceredigion_Wales_UK.jpg


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ian jones




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PostPosted: Jun 16, 2013 04:12    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Am up in Weardale for the summer and don't have access to most of my photos. But here are a few Welsh pieces that I've found on my laptop.

First up a few bits found in cavities in the ironstones from the south Wales coalmeasures.



1-millerite deep nav.jpg
 Description:
Millerite
Deep Navitation Colliery, Treharris, Merthyr Tydfil, Wales, UK
longest crystal 27mm
Greenish, oxydised millerite sprays, with one crystal totally covered with elongated galena crystals, on siderite within an ironstone cavity. Siegenite crystal, 0.5mm to the left of the millerite. collected August 1995.
 Viewed:  25435 Time(s)

1-millerite deep nav.jpg



1-quartz dare.JPG
 Description:
Quartz
Dare Colliery, Cwmparc, Rhondda-Cynon-Taff, Wales, UK
Quartz crystal, 40mm, on siderite, collected October 1992
 Viewed:  25448 Time(s)

1-quartz dare.JPG



1-baryte oakdale.JPG
 Description:
Baryte
Oakdale Colliery, Oakdale, Caerphilly, Wales, UK
Baryte crystals to 15mm, on siderite - these are large for the coalfield. Collected April 1997
 Viewed:  25430 Time(s)

1-baryte oakdale.JPG



1-millerite coed ely.JPG
 Description:
Millerite
Coed Ely Colliery, Coed Ely, Rhondda-Cynon-Taff, Wales, UK
Spray of bright millerite crystals to 15mm with a small ball of transparent red hydrocarbon at the centre. Collected April 1996
 Viewed:  25475 Time(s)

1-millerite coed ely.JPG



1-RSCN1071.JPG
 Description:
Siegenite
Gelli Colliery, Gelli, Rhonnda-Cynon-Taff, Wales, UK
Platy siegenite crystal 6mm across, with smaller octahedral siegenite crystals scattered around it. This is huge for the south Wales Coalfield and, to my knowledge, much the largest found in the UK. Identification confirmed at the National Museum of Wales. Collected August 1988.
 Viewed:  25486 Time(s)

1-RSCN1071.JPG


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Ru Smith




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PostPosted: Jun 16, 2013 22:07    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Fine millerites, Ian and a giant little siegenite.
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PostPosted: Jun 16, 2013 22:10    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Cerussite from Mid Wales.


Cerussite CwmYstwyth 1.jpg
 Description:
Cerussite twins.
Logaulas Mine, Ysbyty Ystwyth, Ceredigion, Wales, UK.
Twins to 1 cm on 6 cm matrix.
 Viewed:  25403 Time(s)

Cerussite CwmYstwyth 1.jpg


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PostPosted: Jun 16, 2013 22:15    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Ewaldite on drusy quartz.


Ewaldite Wales.jpg
 Description:
Ewaldite.
Dolyhir Quarry, Old Radnor, Powys, Wales, UK.
2 mm crystal.
 Viewed:  25394 Time(s)

Ewaldite Wales.jpg


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ian jones




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PostPosted: Jun 18, 2013 04:24    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Calcites from my local quarries north of Cardiff


1-calcite taffs 2.JPG
 Description:
Calcite
Taff's Well Quarry, Taff's Well, Cardiff, Wales, UK
Calcite 6cm, collected 1981.

I was pleasantly surprised to open a copy of the calcite edition of Extra Lapis and see this photo used as an example of twinning.
 Viewed:  25324 Time(s)

1-calcite taffs 2.JPG



1-calcite1 blaen.jpg
 Description:
Calcite
Blaengwynlais Quarry, Bwlch-y-cwm, Cardiff, Wales, UK
120mm calcite crystal showing different growth phases, the latter white calcite partially coating an earlier crystal darkened by ironstaining. Collected 1979.
 Viewed:  25354 Time(s)

1-calcite1 blaen.jpg



1-calcite 2 blaen copy.jpg
 Description:
Calcite and goethite
Blaengwynlais Quarry, Bwlch-y-cwm, Cardiff, Wales, UK
Goethite pseudomorphing a 20mm pyrite crystal grown on a somewhat weathered calcite crystal. The goethite, clearly contemporaneous with the calcite, is loose within the cavity and can be removed and replaced.

Having seen and collected numerous goethite pseudomorphs from Blaengwynlais Quarry, I have never seen a remotely similar specimen from this location.
 Viewed:  25353 Time(s)

1-calcite 2 blaen copy.jpg


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PostPosted: Jun 21, 2013 02:25    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Another millerite, one of my favourites


millerite.jpg
 Description:
Millerite and Siderite
Ferndale Pits, Tylorstown, Rhondda-Cynon-Taff, Wales, UK
crystals to 20mm

Radiating spray of free-standing millerite crystals to 20mm, on siderite. This came out of a huge block of ironstone and then took a bit of getting back in one piece! Collected 1990.
 Viewed:  25233 Time(s)

millerite.jpg


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Jordi Fabre
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PostPosted: Jun 21, 2013 03:39    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

ian jones wrote:
Millerite and Siderite
crystals to 20mm

Radiating spray of free-standing millerite crystals to 20mm, on siderite. This came out of a huge block of ironstone and then took a bit of getting back in one piece! Collected 1990.

From where please?
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PostPosted: Jun 21, 2013 04:01    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Odd, I had the location there originally, it seems to have disappeared between previewing it, making a change, and then posting.

Anyway, the location is Ferndale Pits, Tylorstown, Rhondda-Cynon-Taff, Wales, UK
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PostPosted: Jun 21, 2013 04:44    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Thanks Ian. Already located.
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PostPosted: Jun 22, 2013 14:58    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Some of the World's best paracelsian comes from Wales


1-paracelsian.jpg
 Description:
Paracelsian
Bennalt mine, Lleyn Peninsular, Caernarvonshire, Wales, uk
Exceptional group of paracelsian crystals - the large doubly terminated crystal is 50mm. Ex collection Natural History Museum, London.

Specimen obtained by the Natural History Museum from Sir Arthur Russell in 1941, who in turn obtained it from G.J. Williams, the former Assistant Inspector for Metalliferous Mines and Quarries for the North Wales and Ireland Division. Specimen originally collected in 1919.
 Viewed:  25106 Time(s)

1-paracelsian.jpg


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PostPosted: Jun 22, 2013 18:05    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Magnificent specimen of paracelsian Ian.
Your millerites aren't bad either!
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PostPosted: Jun 22, 2013 22:23    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

That is a very special paracelsian, Ian. I'm amazed the museum released it.
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PostPosted: Jun 23, 2013 02:48    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Thanks guys, the paracelsian was a trade for a rather exceptional mendipite. It is on display in the gallery.

This mornings pictures are an historical anglesite from Parys Mountain and a wavellite/variscite from The Gower. No more for a while as I'm off to Ste Marie.



1-DSCN3321.jpg
 Description:
Anglesite
Mona Mine, Parys Mountain, Amlwch, Anglesey, Wales, UK
Anglesite crystals to 10mm.

From the type locality and very good for the location. Ex Dr T B Wilson (1807-1865) and William S Vaux (1811-82) Collections from the Philadelphia Academy of Natural Sciences Collection.
Collected c1790 when the mine worked through the gossan.
 Viewed:  24983 Time(s)

1-DSCN3321.jpg



1-variscite.jpg
 Description:
Wavellite and Variscite
Pwll Du Head, Bishopston, Swansea, Wales, UK
Wavellite, 6-10mm diameter. Variscite balls 0.5mm

Rich, inter-grown, radiating, acicular lime-green crystals of wavellite, 6-10mm diameter, on and inter-grown with 0.5mm balls of cream to translucent greyish variscite, in a thin joint on red iron-rich chert.
Variscite identification confirmed at the National Museum of Wales, this was the first recorded occurrence of variscite in Wales. Collected July 1997.
 Viewed:  25007 Time(s)

1-variscite.jpg


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PostPosted: Oct 05, 2013 16:41    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Rather feel that I've been neglecting Wales.

A millerite from Ferndale Pits. I have probably spent 1000s of hours collecting on the south Wales coaltips. They have, sadly, almost all been moved or landscaped now. This is a reminder of what could, very occasionally, if you were very lucky, be found.



millerite ferndale W88.26.jpg
 Description:
Millerite
Ferndale 8&9 Pits, Ferndale, Rhondda, Cynon, Taff, Wales, UK
Millerite, main spray 22mm.

The green alteration has often been described as morenosite, but analysis at the National Museum of Wales on a number of specimens failed to find it, returning at best a mixture. Morenosite is a yet unproven in the S Wales coalfield.

However, analysis of a particularly rich example from Llanbradach Colliery by my friend Prof. Pete Williams at the University of Western Sydney showed this, at least, to be nicklehehahydrite.
 Viewed:  24060 Time(s)

millerite ferndale W88.26.jpg


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PostPosted: Mar 06, 2014 10:51    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Tabular, pale blue baryte crystals to 35mm on calcite, exceptional for the locality and for South Wales. Collected by David Lloyd and Richard Barstow May 1981. Ex Richard Barstow collection.


Baryte blaengwynlais W04.01.jpg
 Description:
Baryte
Blaengwynlais Quarry, Cardiff, South Wales, UK
Baryte crystals to 35mm
 Viewed:  22900 Time(s)

Baryte blaengwynlais W04.01.jpg


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PostPosted: Mar 07, 2014 10:53    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Minute dickite crystals richly covering dolomite. From Pant-y-Gaseg Mine, Anglesey, the type-locality.


dickite pgm 2.jpg
 Description:
Dickite
Pant-y-Gaseg Mine, Amlwch, Isle of Anglesey, Wales, UK
Specimen 50mm across
 Viewed:  22880 Time(s)

dickite pgm 2.jpg



P7100903.jpg
 Description:
Pant-y Gaseg adit, driven c1860. The adit crops out half way down a cliff and is very well hidden. Photo taken 8 July 2009.
 Viewed:  22838 Time(s)

P7100903.jpg


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PostPosted: Mar 08, 2014 13:04    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

A 4mm anatase from the brookite type locality of Twll Maen Grisial in north Wales. Collected in 1984, I've spent a bit of time here over the years.


Anatase Prenteg 1.jpg
 Description:
Anatase
Twll Maen Grisial, Prenteg, Gwynedd, Wales, UK
crystal 4mm
 Viewed:  22761 Time(s)

Anatase Prenteg 1.jpg


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James Jones




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PostPosted: Apr 20, 2014 07:28    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

Exciting stuff, originally from North Wales myself so its good to hear that there are good minerals to be had.

Will have a look around the Benallt as my family home lies in the shadow of Rhiw Mountain I'm going back this summer to see what my hammer finds :D

Thanks for sharing!

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PostPosted: May 21, 2014 14:57    Post subject: Re: A mineralogical trip through the regions of the UK - Wales  

One of those Brookites


IMG_0099.jpg
 Description:
Brookite
Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd (Caernarvonshire), Wales
Crystals of about 1.5cm
In the Harvard museum
 Viewed:  22082 Time(s)

IMG_0099.jpg


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