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Opal from
Gunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, UK


Locality type:Pit
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Rashleighite5 photos of Opal associated with Rashleighite at this locality.
Cuprite2 photos of Opal associated with Cuprite at this locality.
Malachite2 photos of Opal associated with Malachite at this locality.
Azurite1 photo of Opal associated with Azurite at this locality.
Metatorbernite1 photo of Opal associated with Metatorbernite at this locality.
Tourmaline1 photo of Opal associated with Tourmaline at this locality.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Gunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, UK
Photo GalleryView Gallery (17 photos)
Data Identifiers
Mindat Occurrence Record ID:8262
Long-form Identifier:1:3:8262:4
GUID (UUID V4):36e1d896-489d-40ae-afce-cf9381faaca1
Nearest other occurrences of Opal
1.0km (0.6 miles) Rock Hill China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK
1.1km (0.7 miles) Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK
1.5km (0.9 miles) Great Wheal Prosper China Clay Pit, Trezaise (Tresayes), Roche, Cornwall, England, UK
1.8km (1.1 miles) Great Longstone China Clay Pit, Longstone Downs, St Mewan, Cornwall, England, UK
3.0km (1.9 miles) Carclaze Old Tin Pit, Carclaze China Clay Pit (Baal China Clay Pit), Carludon, Treverbyn, Cornwall, England, UK
3.9km (2.4 miles) Blackpool China Clay Pit, Trewoon, St Mewan, Cornwall, England, UK
4.6km (2.8 miles) Stenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, Cornwall, England, UK
4.9km (3.1 miles) Great Wheal Prosper China Stone Quarry, Hendra Downs, St Dennis, Cornwall, England, UK
5.3km (3.3 miles) Rostowrack China Clay Pit, Hendra Downs, St Dennis, Cornwall, England, UK
5.9km (3.7 miles) Lady Rashleigh Consols, Prideaux, Luxulyan (Luxullian), Cornwall, England, UK
References
Reference Search (possible matching items)
Book
Endsleigh House 50 Daniell Road Truro, Cornwall TR1 2DA England Printed in Great Britain by Short Run...that he knew of no place on earth that surpassed Cornwall in the number and variety of its minerals. Hogg's...is subtitled 'in wich [sic] is shown how much Cornwall contributes to the illustration of the science'...later by Collins' A Handbook to the Mineralogy of Cornwall and Devon' (1871; 1892 with addenda, the latter...mention Purser's 'Minerals and locations in S.W. England' (1974). The work was never published, although
Journal (article/letter/editorial)
Geoscience in south-west England FIELD EXCURSION TO STUDY ASPECTS OF THE ST. AUSTELL GRANITE AND ITS...south-west England, 10, 370-372. Camborne School of Mines, University of Exeter, Redruth, Cornwall, TR15 3SE... and secondly to look at some aspects of the china clay industry, especially restoration and waste treatment...Pegmatite Quarry, Great Wheal Prosper China Clay Pit and Gunheath China Clay Pit were visited before lunch, which...the restoration and revegetation of some of the china clay waste tips. However, the time was spent profitably
Report (issue)
deposits. Association: Variscite, “chalcedony”, “opal” (Ninghanboun Hills, Australia); strengite, phosphosiderite...Dakota. In England, at Wheal Gorland, Gwennap, and the Gunheath china clay pit, St. Austell, Cornwall. From... MDC6129; The Natural History Museum, London, England, 1932,1092; Harvard University, Cambridge, Massachusetts
Catalog/List
ecimens as half phosphatic geodes from the Hiocene clay vith lmm,yellow-green,tabular xtls in aggregates...FRANCOLITE. Simms Lode,Geevor Mine,Trewellard,Cornwall. Choice,very rich specimen. Ferruginous Quartz...hexagonal xtls. LC,t.20. 15. APATITE. Goonbarrow China Clay Pit,St Austell,Cornwa11. Granite fragment with...ARAGONITE/ROCK CRYSTAL. Greystones Quarry,Launceston,Cornwall. Large milky Quartz breccia fragment with upper...18. ARSENOPYRITE.Hingsten Down Quarry,Calstock,Cornwall. 2 specimens. Specimen A-matrix fragment richly
Book
permission of the author. Printed and bound in the UK by: BookPrintingUK Remus House, Coltsfoot Drive,...English China Clay Group Ltd. This later enabled me to obtain an annual pass into the working clay pits...Minerals and became regular exhibitors at many of the UK mineral shows over the following years. We also visited...We collected together for many years, both in the UK and on the continent. I also helped Ian out later... I helped out at all of the mineral shows in the UK and on the continent, and later with the Bruce &
Book
ambitious. Collecting started in Southern England, Cornwall and Wales, and gradually extended to the Lake...other local mineral clubs as well as the national UK mineral societies: the British Micromount Society...addition, members would visit many Mineral Shows in the UK, particularly the Oxford, Bakewell and Haywards Heath...needles growing on galena (10 x 8 mm) Senghenydd Pit, South Wales. Photo: John Hall -3- ...Chalcanthite (7cm). Nangiles mine, Cornwall. Whilst at school in Cornwall I was fortunate to have a trip
Journal (issue)
dissolved and washed away. In some areas, e.g. in Cornwall, large quantities of very pure cassiterite can...North Africa, South Africa, Russia, Spain and Cornwall, but not North America where the granites have...earlier. Reverbatory furnaces were introduced into Cornwall early in the 19th century, but unfortunately not...return to Weardale, and other sites in the North of England and some members have recently been in Wapping...which also has a treacle mine - a clay pit with very sticky red clay and nearby is a pub called The Treacle
Journal (issue)
pale blue turquoise from Gunheath China Clay Pit near St Austell in Cornwall. These and the distinctive...excellent and beautifully illustrated article in the UK Journal of Mines and Minerals (UKJMM) on Wave/lite:...hydrargillite from its chemical composition of water and clay. (Nothing much changes, even these days mineralogists...you before and they consisted almost entirely of clay which is I conjecture in combination with the Acid...from the center & wh.have been deemed Zeolites are clay in a very pure crystallised state ... This, then
Journal (issue)
UK j min~/1minerals C I 11 lNTS 200~ I 2 EDITORlAL: SPEClALISATION COVER:A fluoritecube 15...Nick Carruth • Ron Cleevcly • David Green 7 The UK ]011mal of Mines and Minerals publishes articles...there were surely good specimen from the clay pits in Cornwall and some nice green balls from Ireland,...information and a full review in the next UKJMM. UK Journal vf Mines & Minerals No. 28 -2- Frontispiece...Carruth: Copse Cottage, Drakewalls, Gunnislake, Cornwall Ron Cleevely: High Croft, Gunswell Lane, South
Journal (issue)
resting upon 150rnrn of yellow clay. This passed down into blue-grey mottled clay with lumps of coal about...about 0.4m thick. It seems that these clay bands acted as a barrier to the iron-Dearing solutions. The exposure...1780s refers to rights to dig cinders, iron-ore and clay (Gloucester Records Office 04212/Tl). In the 19th... cyanotrichite from Cornwall R.E. STARKEY starkey, R.E. 1986. . Cyanotrichite from Cornwall. J. RusseLL Soa...from Cornwall is reported; it has been found in situ in a tin-rich stockwork in Lanivet, Cornwall, associated
Journal (issue)
Derelict Land Advisory Panel (Cornwall) Founder member of CUAAG (Cornwall Underground Access Advisory Group)...Johns Hall refurbished and re-opened. Moved to Cornwall 1981 Trewallard, St. Just then to Penzance. After...North of England. As a 16yr old left to live in Canada from 1956-63 then moved to S.E. England until moving...moving to Cornwall in 1981. Collecting minerals started in 1976-77, as an invalid he now had time to do...do this, in the North of England and Cornwall. Although having deep involvement in issues of conservation
Book
PO Box 315. Harpenden. Hertfordshire AL5 2ZD. England Telephone: +44 (0)1582 762413 Fax: +44 (0)870 055...the production of e0pper. the mining areas of Cornwall and Devon became important producers of b th tin...Oxford University Museum of Natural History; Royal Cornwall Museum, Truro; Sedgwick Museum, University of...1\llaga::i11e, on minerals from localities in Cornwall. Devon. Cumbria and Yorkshire. He was renowned...theLakeDistrictandCornwall (izoklakeite}" WhealCock,StJust,Cornwall SouthTerrasmine,StStephen•in-Brannel. Comwa!I
Book
important part of Society activities. Localities from Cornwall to Cumbria were visited – at a time when attitudes...travelled the British Isles, searching on beaches, in china clay pits and stone quarries, and even down mines...on his caving experiences in various parts of England and illustrated it with a splendid set of colour...Identification”. Rhodochrosite “Slice” Other talks included “Opal cutting and polishing” (a follow-on talk and workshop...talk by Chris Pollard on “Mineral Collecting in Cornwall”. There was also an illustrated talk and demonstration
Journal (issue)
Large black-and-white bear-like mammal, native to China. Eats, Shoots and Leaves Truss, Lynne (2003) Eats...expanded to become one of the largest barite mines in England. Production rose to over 20,000 tons per year in...March 27th at Ladock Community Hall, near Truro, Cornwall. Some of you will remember the very successful...mineral collection of an elderly collector from mid-Cornwall who wishes to remain anonymous, and many also...collectors, particularly from the clay pits and mines of Cornwall and Devon, but also from Cumbria-which
Catalog/List
GILBERTITEon ORTHOCLASE.Megiliggar Rocks,Tremearne, Cornwall. Boxed MIN. Upper Gilbertite coated surface carrying...35. BAYLDOHIT!. Penberthy Crofts Mine,St Hilary,Cornwall, Three rich 1pecimena. Specimen A-large vughy... BAYLDOHITE/MIKETITE, Wheal Carpenter,Gvinear,Cornwall, Large limonitic Quartz gossan fragment coated...,,; 51. CASSITERITE. Redmoor Mine,Callington,Cornwall, Large shale killas fragment forming a mound....52. CASSITERITE, South Terras Mine,St Stephen,Cornwall, Ex Sergeant collection. Two specimens. Specimen
Journal (issue)
de mineralenmarkt worde n aangeboden komen van China of andere landen in het verre Ooste n of van Rusland...Missouri, USA 120-126 23rd Rochester Symposium (Wendy pit, El Indiotambo gold deposit, Chile - black-stemme...Derbyshire, England 81-83 Calcian goyazite and florencite-(Ce) Ero m Gunheath China Clay Pit, Saint-Austell...Saint-Austell , Cornwall 85-87 Epistilbite from the Isle of Skye, Scotland 89-92 Zeolite occurrences in basaltic...Northern Pennine orefield, England 98 A further occurrence of widenmannite in Cornwall 99 Diaboleite from Gunver
Journal (issue)
au China: 20 cm lange Malachit-Stalaktiten. Shilu Mine, Yangchun Co., Yangjiang, Guangdong, China. Escaut...Mobil: 0152-53301879) Neu aus China: Lirokonit und Ana/elm Auch China ist von den Corona-Einschrankungen...ist ja nicht unbedingt etwas Ungewohnliches fiir China, doch selbst nach i.iber vier Monaten weil3 man...Dezember 2020 - fi.ir die beste wurden schon in China 10.000 US-Dollar gefordert. Als Fundort ist nur...auf die fri.ihesten Funde, Lirokonit: Neu aus China! Gilt als beste Stufe des Fundes vom Dezember 2021
Book
permission of Dr Rob Chapman, bottom © The Royal Cornwall Museum; p. 4 top With kind permission of Alan...gold and gemstones, and to the meadows of middle England to look for buried historical treasure. You will...1980s, when over 50,000 people were involved in the UK alone. Today there are around 30,000 detectorists...below are some of the coins that were minted in the UK from the Anglo-Saxon period right up until decimalisation...denarius coin. The penny was first introduced to England in AD 785 by king Offa of Mercia, and it was eventually
Journal (issue)
Frindsbury, Rochester, Kent ME3 8AT, UK. EDITORIAL BOARD: F.B. Atkins, Oxford, UK. RE. Bevins, Cardiff, U.K. RS...Braithwaite, Manchester, UK. T.F. Bridges, Ovington, UK. N.J. Fortey, Keyworth, UK. RA. Howie, Matlock, U...U.K. R.J. King, Tewkesbury, UK. A. Livingstone, Edinburgh, UK. l.R Plimer, Parkville, Australia RE....Bromsgrove, UK. R.F. Symes, London, U.K. P.A. Williams, Kingswood, Australia B. Young, Newcastle, UK. Aims...baryte. Nether Row Brow, Caldbeck Fells, Cumbria, England. M. Rothwell collection. Photograph by Mick Cooper
Book
chisel-shaped terminations, usually with some brown clay staining. ILVAITE UNITED STATES and CANADA IDAHO...lesser specimens, from the boron workings of the Bar Pit (Grant and Wilson, 2001; Moroshkin and Frishman,...underground mine in 1924, then became a giant open-pit operation in the late 1950s (Puffer, 1975;Bancroft...probably predate slightly, the 1992 find. ASIA CHINA Fengjiashan mine near Daye, Daye district, Hubei...its localities in California, South Africa and China, inesite was found in excellent specimens in the
Journal (volume)
Ireland Norman R. Moles 40-46 Buttgenbachite from Cornwall: a single-crystal X-ray study Peter Leverett,...Symplesite and parasymplesite from Cumbria and Cornwall, England. lournal of the Russell Society, 8( 1), 16-17...iron-bearing sulpharsenides from the North of England. Mineralogical Magazine, 43, 389-395. Moreton,...possibility of significant amounts of aluminosilicate clay minerals being present in this sample. Whilst these...desiccation cracks, and occurrence in some deposits with opal are consistent with this. Van Oosterwyck-Gastuche
 
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