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A mineralogical trip through the regions of the UK - England / Cornwall
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James Catmur
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PostPosted: Jun 07, 2013 04:45    Post subject: A mineralogical trip through the regions of the UK - England / Cornwall  



We have so much to see from Cornwall, one of the great classic regions for UK minerals. So let's see what we can add - I expect to see some wonderful material.



P1000845.JPG
 Description:
Bournonite (cog wheel)
Herodsfoot Mine, Cornwall, England, UK
In the Hunterian museum in Glasgow
 Viewed:  31008 Time(s)

P1000845.JPG


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Ru Smith




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PostPosted: Jun 08, 2013 08:42    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

So much diversity and colour when you a look a little closer.


Langite Cornwall 1.jpg
 Description:
Langite, connelite and brochantite.
Sth Wheal Frances, Basset Mines, Illogan, Cornwall, England, UK.
3 mm field of view.
 Viewed:  30997 Time(s)

Langite Cornwall 1.jpg


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Edelmin




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PostPosted: Jun 08, 2013 10:01    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A dark brown massive siderite with several vugs full of small crystals to about 3 mm. What is most interesting of this specimen is the old glued label that reads "Chalybite, Carn Brea, Illogan. Bought of a miner, July, 1874" as can be seen in the third picture. From the Carn Brea Mine, Illogan, Cornwall, United Kingdom, 7.5x5.3x3.6 cm.


DSC_4056.JPG
 Description:
Siderite
Carn Brea Mine, Illogan, Cornwall, England, United Kingdom.
7.5x5.3x3.6 cm.
 Viewed:  30967 Time(s)

DSC_4056.JPG



DSC_4057.JPG
 Description:
Siderite
Carn Brea Mine, Illogan, Cornwall, England, United Kingdom.
7.5x5.3x3.6 cm.
 Viewed:  31050 Time(s)

DSC_4057.JPG



DSC_4058.JPG
 Description:
Siderite
Carn Brea Mine, Illogan, Cornwall, England, United Kingdom.
Detail of attached label.
 Viewed:  30989 Time(s)

DSC_4058.JPG



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Edelmin




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PostPosted: Jun 10, 2013 12:35    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Today's specimen is a large matrix coated on one side by powdery chlorite and elongated crystals of cassiterite ("sparable tin" variety) to about 8x3 mm. From Camborne District, Cornwall, United Kingdom, 13.7x9x7.5 cm.


DSC_4059.JPG
 Description:
Cassiterite and chlorite
Camborne district, Cornwall, United Kingdom.
13.7x9x7.5 cm.
 Viewed:  30848 Time(s)

DSC_4059.JPG



DSC_4060.JPG
 Description:
Cassiterite and chlorite
Camborne district, Cornwall, United Kingdom.
13.7x9x7.5 cm.
 Viewed:  30885 Time(s)

DSC_4060.JPG



DSC_4061.JPG
 Description:
Cassiterite and chlorite
Camborne district, Cornwall, United Kingdom.
13.7x9x7.5 cm., detail.
 Viewed:  30877 Time(s)

DSC_4061.JPG



DSC_4062.JPG
 Description:
Cassiterite and chlorite
Camborne district, Cornwall, United Kingdom.
13.7x9x7.5 cm., detail.
 Viewed:  30875 Time(s)

DSC_4062.JPG



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Ru Smith




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PostPosted: Jun 19, 2013 19:49    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Cassiterite pseudomorph after orthoclase twin, from the Wheal Coates occurrence discovered in 1828.

Davey, S. (1832) "Notice of pseudomorphous crystals of oxide of tin, found in Huel Coates mine, in St Agnes, in the year 1828" Trans. Royal Geol. Soc. Cornwall 4 pp 484-485.



Cass orth 1.jpg
 Description:
Cassiterite pseudomorph after orthoclase.
Wheal Coates, St Agnes, Cornwall, UK.
37 mm.
 Viewed:  30817 Time(s)

Cass orth 1.jpg



Cass orth 2.jpg
 Description:
Cassiterite pseudomorph after orthoclase.
Wheal Coates, St Agnes, Cornwall, UK.
37 mm.
 Viewed:  30734 Time(s)

Cass orth 2.jpg


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PostPosted: Jun 21, 2013 12:57    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Chalcopyrite-coated tetrahedrite.


Tetrahedrite chalcopyrite Cornwall.jpg
 Description:
Tetrahedrite coated by chalcopyrite with galena and quartz.
Herodsfoot Mine, Lanreath, Cornwall, UK.
39 mm.
 Viewed:  30729 Time(s)

Tetrahedrite chalcopyrite Cornwall.jpg


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PostPosted: Jun 21, 2013 13:04    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Bornite from St Ives.


Bornite St Ives.jpg
 Description:
Bornite with quartz.
St Ives Consols, St Ives, Cornwall, England, UK.
36 mm specimen.
 Viewed:  30738 Time(s)

Bornite St Ives.jpg


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PostPosted: Jun 21, 2013 13:11    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Orthoclase Karlsbad twin altering to kaolinite.


Orthoclase Cornwall.jpg
 Description:
Orthoclase Karlsbad twin altering to kaolinite.
Melbur China Clay Pit, St Austell, Higher Fraddon, Cornwall, England, UK.
32 mm.
 Viewed:  30704 Time(s)

Orthoclase Cornwall.jpg


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PostPosted: Jul 07, 2013 11:32    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

My addition


Tetrahedrite with Chalcopyrite and Quartz - Herodsfoot Mine_Lanreath_Liskeard_Cornwall_England_UK.jpg
 Description:
Tetrahedrite covered by Chalcopyrite and Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, UK
Specimen size: 8.5 × 5.8 × 3.5 cm
Main crystal size: 0.5 × 0.5 cm
Photo: Reference Specimens
 Viewed:  30471 Time(s)

Tetrahedrite with Chalcopyrite and Quartz - Herodsfoot Mine_Lanreath_Liskeard_Cornwall_England_UK.jpg



Tetrahedrite with Chalcopyrite and Quartz - Herodsfoot Mine_Lanreath_Liskeard_Cornwall_England_UK - Detail.jpg
 Description:
Tetrahedrite covered by Chalcopyrite and Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, UK
Detail
Photo: Reference Specimens
 Viewed:  30436 Time(s)

Tetrahedrite with Chalcopyrite and Quartz - Herodsfoot Mine_Lanreath_Liskeard_Cornwall_England_UK - Detail.jpg


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PostPosted: Jul 13, 2013 03:27    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Two more pseudomorphs after orthoclase


1-DSCN7196a.jpg
 Description:
Kaolinite
North Goonbarrow China Clay Pit, Bugle, Cornwall, England, UK
Kaolinite replacing othoclase feldspar, 60mm. These are known colloquially as a "pig's egg"
 Viewed:  30384 Time(s)

1-DSCN7196a.jpg



1-Cassiterite Coates 1.jpg
 Description:
Cassiterite
Wheal Coates, St. Agnes, Cornwall, England, UK
Cassiterite
Wheal Coates, St. Agnes, Cornwall, England, UK
Complex cassiterite pseudomorph after orthoclase feldspar, 30mm. These were collected c1828.
 Viewed:  30368 Time(s)

1-Cassiterite Coates 1.jpg


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PostPosted: Jul 14, 2013 04:17    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A Cornish rarity.


1-Stibnite Boys 1a.JPG
 Description:
stibnite
Wheal Boys, Port Isaac, St Endellion, Cornwall, England, UK
45x35mm group of coarse stibnite crystals. Stibnite is a rare Cornish mineral and even more rarely occurs crystallised.
19th C specimen
 Viewed:  30318 Time(s)

1-Stibnite Boys 1a.JPG


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PostPosted: Jul 14, 2013 14:49    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A classic


Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - front.jpg
 Description:
Bournonite "cogwheel" with Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, United Kingdom
Specimen size: 5.2 × 2.7 × 3.3 cm
Main crystal size: 2.5 × 1.7 cm
Mined about 1926
Former collection of Sir Arthur Russell / Former collection of the Folch duplicates
Photo: Reference Specimens
 Viewed:  30246 Time(s)

Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - front.jpg



Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - side.jpg
 Description:
Bournonite "cogwheel" with Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, United Kingdom
Specimen size: 5.2 × 2.7 × 3.3 cm
Main crystal size: 2.5 × 1.7 cm
Rear
 Viewed:  30234 Time(s)

Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - side.jpg



Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - top.jpg
 Description:
Bournonite "cogwheel" with Quartz
Herodsfoot Mine, Lanreath, Liskeard, Cornwall, England, United Kingdom
Specimen size: 5.2 × 2.7 × 3.3 cm
Main crystal size: 2.5 × 1.7 cm
Top
 Viewed:  30195 Time(s)

Bournonite with Quarzt - Herodsfoot Mine_Lanreath_Liskeard District_Cornwall_England_United Kingdom - top.jpg


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PostPosted: Jul 14, 2013 22:01    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Quartz included with hematite.


QtzCornwall.jpg
 Description:
Quartz
Melbur China Clay Pit, Melbur, St Stephen-in-Brannel, St Austell District, Cornwall, England
11.7 x 6.9 x 4.7 cm.
 Viewed:  30188 Time(s)

QtzCornwall.jpg



QtzCornwallDet.jpg
 Description:
 Viewed:  30171 Time(s)

QtzCornwallDet.jpg


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PostPosted: Jul 15, 2013 03:43    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A couple of hematites from the St Just mines.


1-Hematite Geevor 1.jpg
 Description:
Hematite
Geevor Mine, Pendeen, St Just, Cornwall, England, UK
Botryoidal hematite on quartz, 100x70mm, from Geevor, the "mine under the sea". Ex Richard Barstow collection.
 Viewed:  30168 Time(s)

1-Hematite Geevor 1.jpg



1-Hematite Wh Owles 1.JPG
 Description:
Hematite
Wheal Owles, Botallack, St. Just, Cornwall, England, UK
Specular hematite crystals, typically 2-3mm, on quartz. 19th C specimen, ex Lt Col Williams (Burncoose Assay Office) collection.
 Viewed:  30160 Time(s)

1-Hematite Wh Owles 1.JPG


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PostPosted: Jul 15, 2013 15:01    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Another Cornish classic, "jackstraw"cerussite from Pentireglaze mine. This mine was famous for very large cerussites of this type. In the early 1800s, there are records of specimens being hand-carried on stretchers upwards of 30 miles due to their fragility.


1-Cerussite Pentire 1.JPG
 Description:
Cerussite
Pentireglaze Mine, Polzeath, St. Minver, Cornwall, England, UK
Jackstraw cerussite crystals, 55mm max, elsewhere typically 20mm. Collected in the early 1990s.
 Viewed:  30113 Time(s)

1-Cerussite Pentire 1.JPG


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PostPosted: Jul 16, 2013 03:53    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Quartz, var. chalcedony. Ex Arthur Scoble collection


1-Chalcedony Pednandrea 1.JPG
 Description:
Chalcedony
Pednandrea Mine, Redruth, Cornwall, England, UK
115mm across
An old tin mine, Pednandrea was already active in the early 18th century. The final period of working occurred between 1854 to 1891. The mine is known for having produced fine specimens of chalcedony
 Viewed:  29973 Time(s)

1-Chalcedony Pednandrea 1.JPG


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PostPosted: Jul 18, 2013 15:46    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A not to well known Cornish classic


1-Vivianite Owles 1.JPG
 Description:
Vivianite
Wheal Owles, Botallack, St. Just, Cornwall, Englan, UK
Group of radiating vivianite crystals, 7mm across, in jasper. Ex Henry Ludlam (1822-1880) and Geological Museum, London, collections. The Ludlam collection was once on display in the Geological Museum, one of very few old extant collections still held in one piece and available to be seen. Now sadly incorporated into the Natural History Museum Collection and no longer on display.
 Viewed:  29888 Time(s)

1-Vivianite Owles 1.JPG



1-Vivianite Owles 1b.JPG
 Description:
Vivianite
Wheal Owles, Botallack, St. Just, Cornwall, England, UK
label on rear
 Viewed:  29866 Time(s)

1-Vivianite Owles 1b.JPG


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PostPosted: Jul 19, 2013 04:06    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

Group of 1cm bertrandite crystals with quartz and chlorite. Ex Richard Barstow collection, exceptional for the UK.

Collected in 1978. I was collecting with Dick when we got this and lost the toss to decide which of us was going to have it! Dick Barstow died tragically young, there are a lot of memories in this rock.



1-DSCN6983a.jpg
 Description:
Bertrandite
Hingston Down Quarry, Gunnislake, Calstock, Cornwall, England, UK
 Viewed:  29828 Time(s)

1-DSCN6983a.jpg


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PostPosted: Jul 22, 2013 18:21    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

A great specimen, Ian. Association of minerals with history and people adds hugely to their interest and this is a particularly resonant example.
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PostPosted: Jul 24, 2013 15:59    Post subject: Re: A mineralogical trip through the regions of the UK - England / Cornwall  

I love specimens with some history Ru, it doesn't necessarily make them better, but it does make them more interesting. This is a Talling chalcotrichite that I traded with the BM London. I have since trimmed some of the quartz matrix away


1-chalcotrichite FC 1d.JPG
 Description:
Cuprite, var chalcotrichite
Fowey Consols, Tywardreath, St. Austell, Cornwall, England, UK
Chalcotrichite with goethite in quartz, overall specimen 70x70mm. Ex Natural History Museum collection, purchased from mineral dealer Richard Talling at a cost of £1 10s in 1864
 Viewed:  29471 Time(s)

1-chalcotrichite FC 1d.JPG



1-Chalcotrichite FC 1b.JPG
 Description:
Cuprite var chalcotrichite
Fowey Consols, Tywardreath, St. Austell, Cornwall, England, UK
this cavity 20x12
 Viewed:  29506 Time(s)

1-Chalcotrichite FC 1b.JPG



1-Chalcotrichite FC 1 Lab.JPG
 Description:
Cuprite var chalcotrichite
Fowey Consols, Tywardreath, St. Austell, Cornwall, England, UK
Talling number 2009 on side of specimen
 Viewed:  29524 Time(s)

1-Chalcotrichite FC 1 Lab.JPG



1-1-talling invoice 2.jpg
 Description:
Cuprite var chalcotrichite
Fowey Consols, Tywardreath, St. Austell, Cornwall, England, UK
Copy of Talling Invoice showing that this specimen was purchased for the sun of £1 10s in 1864
 Viewed:  29566 Time(s)

1-1-talling invoice 2.jpg


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