 | | Journal (article/letter/editorial) | | compositionallyequivalentto a mixture of pyrrhotite, phenakite, and fayalite, but danalite's natural occurrenceswith.../magnetitefield boundary. Outside this field, phenakite (or, at low temperatures,bertrandite)is stablewith...danalite-helvite solid solutions occur as overgrowths on phenakite with magnetite,pyrite, and quartz. Danalite is...FerSiOo 2 FeoBe,(SiOo)rS danalite: troilite * phenakite* fayalite Troilite (Tr) is not a common terrestrial...incompatibilities lent to a mixture of troilite, phenakite, and fayalite, (unstable4ssemblages) in the Be |  | Clark, A. M., Couper, A. G., Embrey, P. G., Fejer, E. E. (1986) Waylandite: new data, from an occurrence in Cornwall, with a note on ‘Agnesite’. Mineralogical Magazine, 50 (358) 731-733 doi:10.1180/minmag.1986.050.358.23 | Journal (article/letter/editorial) | | 3 Waylandite: new data, from an occurrence in Cornwall, with a note on 'agnesite' IN the course of a...mineral collection of the Royal Institution of Cornwall, Truro; and another Restormel specimen (BM 32875...X-r%v p~wder data for w~vlandite f r ~ Restormel, Cornwall ~_.A ~1~. a-o~. ~b~. i0.i 00.3 5.665 5.392...Restormel Mine, Cornwall. Brownish crystal. Truro Museum 1588. Restormel Mine, Cornwall, Brownish crystal...crystal. Truro Museum 1588. Restormel Nine, Cornwall. Bluish crystal. 4. 5, BM 1 9 8 2 , 4 3 0 . Busiro |  | | Journal (article/letter/editorial) | | December 1961 No. 255 Beryllium minerals in Cornwall and Devon: helvine, genthelvite, and danalite...occurrences in Cornwall and one in Devon, and of the latter, one occurrence in Cornwall, are described...old specimens with the vague locality 'Redruth', Cornwall; occurrences at four Cornish localities are described...chemical analysis. Previous occurrence of danalite in Cornwall. Danalite is the only member of the helvine group...tetrahedrons with quartz and mispickel, Redruth, Cornwall', and was described by Miers and Prior 2 in 1892 |  | | Journal (issue) | | UK Journal of mes ·and .Minerals Issue SprJng 1989 , No ...6 Pr:f ee ~3.95 ·- • r .. Arnold...Trewellard, Penzance, Cornwall. TR19 7SU Tel: (0736) 788305 Calcite (Cornwall) UK Journal of Mines and...Merritt Cassiterite from Whiteworks Carharrick, Cornwall R. Morton.Dr. K.F.G. Hosking 22 Mining Methods...Boscawcn Diagonal Shaft at Botallack Mine. St. Just. Cornwall. Reproduced hy permission of City of Manche ·ter... Editorial Our objective to publish three issues of the UK Jourrral of Mines and Minerals annually has yet to |  | | Journal (article/letter/editorial) | | University Auburn, Alabama 36849 cookrob@auburn.edu Phenakite Downloaded by [University of Tennessee, Knoxville]...rarer topaz, garnet, and phenakite specimens. Perhaps America’s best-known phenakite occurrence, and certainly...in the recent book American Mineral Treasures. Phenakite from this exceptional locality has been chosen...mineral in this issue’s Connoisseur’s Choice. Phenakite varies from colorless through yellow, pink, and...localities, and, when colorless, phenakite can resemble quartz. Phenakite exhibits a Mohs hardness of 7 |  | | Journal (article/letter/editorial) | | minerals in the Museum of the Royal Institution of Cornwall, no. 2, p. 32. Dana, E. S. (1892) The System of...crandallite group, agnesite, St Agnes, Restormel, Cornwall. A. M. CLARK A. G. COUPER P. G. EMBREY E. E. FEJER...1986, VOL. 50, PP. 733-4 Cathodoluminescence of phenakite A VARIETY of minerals are known to luminesce under...contribution describes the occurrence of luminescing phenakite in samples from Late Proterozoic phlogopitized...contained several phenakite grains which gave a sky blue cathodoluminescence. A few phenakite grains lacked |  | | Journal (volume) | | non-member subscription rates for this volume are: UK £13 (including P&P) and Overseas £15 (including P&P)...proudly displaying a copy of Minerals of Northern England. Roy Starkey photograph. Journal of the Russell...Herderite-hydroxylherderite series minerals from Chywoon Quarry, Cornwall Tom F. Cotterell, Neil Hubbard and David Moulding...euhedral schulenbergite at the Penberthy Croft Mine, Cornwall John Betterton and Ian E. Grey 34–35 PAPERS...rite series minerals, from Chywoon Quarry, in Cornwall. There are, however, four other Cornish localities |  | | Journal (article/letter/editorial) | | Grassmann's method, 333. Axinite, Cornwall, 281. - - B~ckstr(im (H.).---Phenakite, 134. Baddeleyite, Sweden...in calcite, 48. Conchite, 363. Copper-pyrites, Cornwall, cryst., 324. alteration of, 376. Copper sulphate...and Lewis (W. J.).-Crystals of copper-pyrites, Cornwall, 324. Hamlinite, composition, 45. ~ group, 249...(C). - - Handbueh der Mineralogie, 36. - - - Phenakite, 134. Hitchcockite, composition, 223, 250. Cumberland...9and Hall (A. L . ) . Crystals of copper-pyrites, Cornwall, 324. Limburgite, Little I. of Trinidad, 322. | | | Journal (article/letter/editorial) | | Grassmann's method, 333. Axinite, Cornwall, 281. - - B~ckstr(im (H.).---Phenakite, 134. Baddeleyite, Sweden...in calcite, 48. Conchite, 363. Copper-pyrites, Cornwall, cryst., 324. alteration of, 376. Copper sulphate...and Lewis (W. J.).-Crystals of copper-pyrites, Cornwall, 324. Hamlinite, composition, 45. ~ group, 249...(C). - - Handbueh der Mineralogie, 36. - - - Phenakite, 134. Hitchcockite, composition, 223, 250. Cumberland...9and Hall (A. L . ) . Crystals of copper-pyrites, Cornwall, 324. Limburgite, Little I. of Trinidad, 322. |  | | Journal (article/letter/editorial) | | Grassmann's method, 333. Axinite, Cornwall, 281. - - B~ckstr(im (H.).---Phenakite, 134. Baddeleyite, Sweden...in calcite, 48. Conchite, 363. Copper-pyrites, Cornwall, cryst., 324. alteration of, 376. Copper sulphate...and Lewis (W. J.).-Crystals of copper-pyrites, Cornwall, 324. Hamlinite, composition, 45. ~ group, 249...(C). - - Handbueh der Mineralogie, 36. - - - Phenakite, 134. Hitchcockite, composition, 223, 250. Cumberland...9and Hall (A. L . ) . Crystals of copper-pyrites, Cornwall, 324. Limburgite, Little I. of Trinidad, 322. |  | | Journal (article/letter/editorial) | | increasingactivities of the acid componentsF•O_I and P•O•, phenakite, Be•SiO4,becomesstable with fluorite or fluorapatitein...Wollastonite Wol CaSiOa Gugiaite Gug Ca•BeSi•O7 Phenakite Phe Be•SiOt Jahns (1955) and Schneiderh6hn...alone or with helvite, (Mn, Fe, Zn)a(BeSiO4)3Sor phenakite in desilicated, Al-poor, skarn-like environments...minerals such as quartz or topaz in fluorite and phenakite-bearing cavities in pegmatites. Other slightly...pegmatites with corroded beryl, albite, quartz, topaz, phenakite, triplite, fluorapatite, fluorite, under conditions |  | | Journal (article/letter/editorial) | | Skarn garnets from South-West England SKARN GARNETS FROM SOUTH-WEST ENGLAND D.H.M. ALDERTON Alderton...Skarn garnets from South-West England. Geoscience in South-West England, 14, 91–97. Chemical analysis...analysis of garnets from skarns in south-west England has revealed that they are all grandites, containing at...Sciences, Royal Holloway, Egham, Surrey TW20 0EX, UK (E-mail: d.alderton@rhul.ac.uk) Keywords: skarn...occur in several geological settings in south-west England, yet detailed descriptions are typically brief |  | | Journal (article/letter/editorial) | | end. Aenigmatite, New South Wales, 241 Agnesite, Cornwall, 731 ALDAHAN, A. A., phyllosilicate intergrowths...pyrosmalite, 527; SOUTH AUSTRALIA, Umberatana, phenakite, 733; WESTERN AUSTRALIA, Mooloo Downs station...Embreyite, South Africa, 728 ENGLAND, SW, Permian lavas, 481; CORNWALL,Restormel mine, waylandite, 731;... strontian chabazite, 348 LOT~RMOSER, B. G., phenakite cathodoluminescence, 733 MACDONALD,R., ROCK, N...MILLER, I., freibergite and tetrahedrite, 717 Phenakite, South Australia, cathodoluminescence, 733 Phosphate |  | | Journal (article/letter/editorial) | | tourmaline, albite, quartz, corundum, fluorite, phenakite, tantalite-columbite, rutile, zircon and carbonate...abundances of tantalite-columbite, tourmaline and phenakite within the selected samples. To evaluate the conversion...Lottermoser An exclusive occurrence of beryl and phenakite has been observed: beryl is restricted to the...is partly replaced by muscovite and kaolinite. Phenakite is largely found in the fluorophlogopite-richaureole...solutions also promotes the crystallization of Be as phenakite from hydrothermal solutions (Syromyatnikov et |  | | Journal (issue) | | gemstones. Simply order by telephone or write to the UK address above. Pl ease state which tray you require...(acicular) crystals of bismuthinite from Cornwall (England). ::0 )> Below: Prismatic crystals of bismuthinite...following locations: Tazna (Bolivia); Carn Brea, Cornwall (England); Sardinia and Turin (Italy); Peru; Haddam...their external appearance. Phenakite France, lvlexico, Norway, Phenakite is a rare silicate of Russia...diamonds. T he name ·the finest crystals display a phenakite comes from the twinkling, star-like effect called |  | | Journal (article/letter/editorial) | | Arthur Russell : On the occurrence of Phenakite in Cornwall. Phenakite was unknown in the British Isles until...specimen at the Cheesewring Quarry, Linkinhorne, Cornwall. In 1906 he collected further specimens, showing...was labelled "Topaz on Quartz from St. Agnes". Phenakite was also recognized on a specimen found about... J. H. Collins at South Crofty Mine, Illogan, Cornwall. Search at the Natural History Museum and the...Practical Geology brought to light other specimens of phenakite placed under apatite.—Dr. G. F. H. Smith : (1) |  | | Journal (article/letter/editorial) | | On the Occurrence of Phenakite and Scheelite at Wheal Cock, St. Just, Cornwall." The author found good...(undoubtedly phenakite) described by Sowerby in 1804 as argilla electrica or white tourmaline; phenakite was not...OOBEBSPONDENOE. THE TERTIARY GEOLOGY OF DEVON AND CORNWALL. SIR,—Referring to your reviewer's remarks in...relative to " The Tertiary Geology of Devon and Cornwall", may I be allowed a few lines to meet the objections |  | | Journal (article/letter/editorial) | | — Arthur Russell: On a new locality of Phenakite is Cornwall. A single specimen showing numerous colourless...prismatic crystals of phenakite was found by him at Wheal Gorland, Gwennap, Cornwall, this year. The specimen |  | | Journal (article/letter/editorial) | | Ural Mountains, Russia were obtained in 1876. PHENAKITE is noted by numerous loose crystals and matrices...Cahn in 1897. A series of six fine specimens of phenakite from Crystal Peak, Florissant, Colorado were obtained...Cahn in 1898; and 883 a number of groups of phenakite crystals on matrix from Takowaja, Urals, Russia...small, bright, green crystals on matrix from Cornwall, England; some of which were obtained from a Mr. Beadle...Moor, Cumberland, England (Foote, 1885); and from Fallowfield, Northumberland, England (1888). 885 WULFENITE |  | | Catalog/List | | displays well. Size: 3 x 4 x 5 cm - $40 711) PHENAKITE - "East Siberia", Russia; We know the locality...out. The specimen consists of white botroydial phenakite :ds, in b2lls up to 1 cm, covering matrix with...perky box. 13x27mm-$15 724) FLUORITE - Cumberland, England; Lovely purple opaque cubic xls to 2.5 cm in size...764) ALSTONITE - Brownley Hil! Mine, Cumbria, England; Excellent white sharp hexagonal xls on matrix...$12 765) BAYLDONITE - Penberthy Croft Mine, Cornwall, England; Rich green xls covering matrix. Superb xls |  | | Journal (article/letter/editorial) | | stitution for OH; fiuorannite or intermediate F-rich Phenakite BerylFluorite .•_ _• ..... Rhodochrosite : •pessartine...labelsare simplified;thus•ryl/phenakite indicatesthe breakdown of beryl to phenakite+ quartz + topazor K-feldspar...very high gKr and lower gi-ir to phenakite + K-feldspar+ quartz. Phenakite(Be2SiO4) or other Al-freeberylliumminerals(e...becomesunstablewith respectto a mixture 838 DONALD M. BURT Phenakite type of reaction involvesone HF for each HzO...highert•a•osuchthat biotitealtersto chlorite. of muscovite+ phenakite(or morelikely, bertrandite, Be4SizO7(OH)z) + quartz; |  | | Journal (issue) | | mineralization at Roskrow United Mine, Ponsanooth, Cornwall, by J. Taylor, B.Sc., A.M.I.M.M., R. K. Harrison...Sc. 33 IV.-Radian anglesite from Wheal Speed, Cornwall, by R. K. Harrison, M.Sc., and K. Taylor, B.Sc...mic.rodine which has replaced beryl Bavenite, phenakite and beryllian n1argarite replacing beryl in a...25] URANIFEROUS COLLOPHANE 21 in the north of England with occurrences of similar material. In north...and shelf limestones in north-west Derbyshire, England. Bull. Geol. Soc. Amer., 69, 871-98. III.-STRUCTURE |  | | Journal (article/letter/editorial) | | fluoritefeldspathic rocks developed on the Cornwall Peninsula, England. Sericitefluorite bodies are also distributed...classified as quartzmicaceous, quartzhematite and phenakiteberyle, sometimes, with helvite. Quartzmicaceous...quartzhematite greisen with plots of micaceous and phenakiteberyle greisen with helvite. The contents of beryllium...Crystals are crushed. Photo M.B. Leibov Photo 7. Phenakite crystal. Size 0,9 x 0,8 cm. Site # 2 in the endocontact...Chernikov’s sample. Photo M.R. Kalamkarov Photo 8. Phenakite replaced by bertrandite. Size 1 x 0,8 cm. Site |  | | Catalog/List | | CASSITERITE. Old lmpc1iaJ Goonba row Pit., Bugle, Cornwall, UK. Granite wiUt good ar ea of cassiterite xls...COBALTIAN CALCffE. Tynebottom Mine, Garrigill, Teesdale, UK. Small pink stalactite/ flowstone formation . 7cm...FLUORITE on QUARTZ. Cambokeels Mine, Eas1gate, IJu.rham, UK. SiJ1gle twinned Jluotile x1, 18mm x I 3mm x I3mm...£25 19. FLUORITE. Hilton MiJ1e, Appleby, Cwubria, UK. Most of large (33nun edge) siJ1gle xJ. Sha.rp edges...F LUORITE · West Pastures Mme, Stanhope' Dw"lmm, UK. Presentable g:ioup of pale green xls to 2cm. Overall |  | | Journal (issue) | | Trewellard, Penzance, Cornwall. TR19 7SU Tel: (0736) 788305 Wulfenite (Mexico) UK Journal of Mines and...COVER Barite. Parksidc Mine, West Cumberland. England. Crystals to %mm Ralph Sutcliffe Collection Photograph...northern part of the Nancherrow valley in Cornwall, South West England. The derelict engine houses of Wheal...heyday of the mine was in the mid 19th Century when Cornwall was the centre of world tin production. Even during...4 A.W.G. Kingsbury recorded the discovery of phenakite at the Wheal Edward section of Wheal Owles. The |
|
Cheesewring Quarry, Minions, Linkinhorne, Cornwall, England, UK