Crystalline "ferns" of gold in Calcite, Hope's Nose, Torquay, Devon. Published specimen |
Crystalline gold in Calcite, Hope's Nose, Torquay, Devon. |
Crystalline gold in Calcite, Hope's Nose, Torquay, Devon. |
Native silver with sphalerite, ca 1861-4, Wheal Ludcott, St Ive |
Native silver with sphalerite, ca 1861-4, Wheal Ludcott, St Ive |
19 mm chalcocite group including single elongate crystals and pseudohexagonal twins. Geevor Mine, Cornwall. |
Chalcocite twins, 7 mm diameter, Geevor Mine, St Just, Cornwall. |
A fine Cornish chalcocite twin, 17 mm, cruciform when viewed end-on, Geevor Mine |
Chalcocite twins on quartz, Wheal Neptune, late 18th/early 19th century |
Sowerby (1817) chalcocite from Wheal Abraham, found 1813. |
Very large chalcocite twin, 5 cm, two old US labels state Cumberland, England, but presumably an ancient Cornish specimen. |
Bornite crystals,cube-octahedra, Redruth, Cornwall, 14 mm. |
Bornite penetration twins to 6 mm on 8 cm matrix, Carn Brea Mine, Illogan, Cornwall. |
Sowerby (1817) Bornite twins, Tincroft |
Bornite penetration twins to 6 mm on 8 cm matrix, Carn Brea Mine, Illogan, Cornwall. |
Bornite crystals, Carn Brea Mine |
Twinned sphalerite (Fe-rich) to 3cm with pyrite and quartz, 23 cm. 600' level, Wheal Jane, Cornwall. Published specimen. |
Sphalerite crystals to 2 cm with pyrite on quartz crystals to 3 cm. 15 cm specimen, Wheal Jane. |
Sphalerite crystals to 2 cm with pyrite on quartz crystals to 3 cm. 15 cm specimen, Wheal Jane. |
Twinned sphalerite (Fe-rich) to 3cm with pyrite and quartz, 23 cm. 600' level, Wheal Jane Mine, Cornwall. Published specimen. |
Burnonite crystals on quartz, 5 x 4 x 3 cm, Herodsfoot, Cornwall |
Herodsfoot bournonite detail of cruciform twins |
Herodsfoot bournonite detail of cruciform twins |
Model showing cruciform bournonite twin as seen in preceding specimen |
Tetrahedrite crystals, chalcopyrite-coated to 2 cm on 5 cm matrix. Herodsfoot Mine, Lanreath, Cornwall. |
Herodsfoot tetrahedrite crystal model |
Wheal Jewell tennantite, crystals to 7 mm on 5 cm matrix. |
Wheal Jewell tennantite crystal model |
Sowerby 1817 v5, "Gray Sulphuret Of Copper," tennantite |
Carn Brea, Redruth, iridescent chalcopyrite var. blister copper, 8 cm. |
Blistered copper from Cook's Kitchen illustrated in Rashleigh 1797 Plate IX |
Sowerby 1817 v5 illustration of blistered copper |
Dolcoath Mine chalcopyrite quartz siderite |
Old label for Dolcoath Mine chalcopyrite quartz siderite |
Sowerby 1804 plate 78 chalcopyrite on quartz, Cornwall |
Wheal Hope galena after pyromorphite, plumbeine, 65 x 25 x 33, crystals to 15 mm. |
Arsenopyrite penetration twin on {201}, 1 cm crystals, Barrett's Zawn, St Teath, Cornwall |
Cuprite var chalcotrichite in brilliant patches to 7 mm across. Wheal Pendarves, Camborne, Cornwall |
Cyclic cassiterite twin, 15 mm, Bunny Mine, St. Austell, Cornwall. |
Cassiterite twin, about 1 mm, Wheal Pendarves, Troon, Cornwall |
South Crofty 5 mm sparable "elbow" twin 5 mm |
South Crofty 5 mm sparable "elbow" twin 5 mm |
Model of sparable cassiterite crystal from South Crofty |
Goethite crystals on 8 cm matrix, Restormel, Cornwall. |
Crystal model for Restormel goethites |
Goethite, "hydro-oxyde of iron" from Sowerby (1817) |
Gemmy purple fluorite crystals to 15 mm with chalcopyrite, 9 cm. St Agnes. Crystals show cube and tetrahexahedron faces. |
St Agnes fluorite detail |
Crystal model for StAgnes fluorite |
Gemmy siderite crystals to 10 mm on 55 x 35 x 25 mm matrix, St. Agnes, Cornwall |
The Heuland/Robertson zoned prismatic siderite with pinacoids, Wheal Maudlin, 1818-1819 find, ex Heuland. Published specimen. |
Concentric zoning in siderite, 12 mm across, Huel Maudlin, ca 1819, ex Heuland. Published specimen. |
Crystal model for Wheal Maudlin siderite |
Calcite twin, 44 mm, Wheal Wrey, St Ive, Cornwall. Published specimen. |
Crystal model for the steep rhombohedra terminated by pinacoid seen in Wheal Wrey calcite |
Doubly terminated aragonite crystals to 28 mm. Buckfastleigh, Devon. |
Rhodochrosite, Durnford Quarry, Long ashton, Somerset, 33 mm |
Linarite crystals to 6 mm on 50 mm x 43 mm x 30 mm matrix. Penberthy Croft Mine, St Hilary, Mount's Bay District, Cornwall. |
Detail of Penberthy Croft linarite crystals. Published specimen. |
Crystal model for the Penberthy Croft linarite |
Gem champagne crystals of baryte to 2 cm on 4 cm matrix, Peak Hill, Sidmouth, Devon. |
Phosgenite crystal, 2 mm on 15 mm matrix from Penpol Smelter, Penpol, Carnmenellis, Cornwall. |
Wolframite crystals to 35 mm on quartz, langite and chalcopyrite matrix, Hingston Down Quarry, Callington, Cornwall |
Fluorapatite complex gem crystal (7 mm), likely to be from Colcerrow, near the village of Luxulyan |
Apatite model, showing 62 faces. |
Detail of olivenite specimen from Wheal Gorland. Largest crystal shown 2 mm long |
Crystal model for Wheal Gorland olivenite |
Libethenite Foote 1.jpg |
Brilliant dark gemmy libethenite crystals, ex Foote |
Crystal model of the Foote libethenite crystal |
Libethenite in crystals to 15 mm, Wheal Phoenix, Liskeard District, Cornwall. |
Phoenix libethenite model |
Torbernite, crystals to 5 mm on 5 cm matrix. Published specimen. |
Olivenite crystals to 5 mm on 3 cm quartz matrix. Wheal Gorland, Cornwall. |
Olivenite crystals with cornwallite on quartz, Wheal Gorland, Cornwall, 55 mm specimen |
Dufrénite, crystalline spheroids to 7 mm on 8 cm goethite matrix. Wheal Phoenix, Linkinhorne, Cornwall. |
Dufrénite, crystalline spheroids to 7 mm on 8 cm goethite matrix. Wheal Phoenix, Linkinhorne, Cornwall. |
Hentschelite with rockbridgeite and minor chalcosiderite, known as "Andrewsite," a classic from Wheal Phoenix |
Liroconite crystals to 6 mm on limonite matrix, Wheal Gorland, St. Day, Cornwall. Published specimen. |
Liroconite detail with crystals to 6 mm. Published in Lapis 7-8/2020 pg 25. |
Liroconite crystal model |
Clinoclase composite crystal with acicular olivenite, 36 mm specimen, Wheal Gorland, Cornwall |
Clinoclase detail 2.jpg |
Chalcophyllite crystals to 4 mm on 25 x 20 x 15 mm matrix. Wheal Gorland, St Day, Cornwall. |
Chalcophyllite crystals to 4 mm on 25 x 20 x 15 mm matrix. Wheal Gorland, St Day, Cornwall. |
Chalcophyllite crystals to 10 mm on 64 x 54 x 31 mm matrix |
Crystal model for Cornish chalcophyllite |
Langite and connellite with brochantite, Wheal Frances Basset Mines, Illogan, Cornwall, UK |
Bayldonite crystals, each about 0.5 mm across, from Penberthy Croft Mine, Cornwall. 2 cm specimen. |
Chalcosiderite, 80 x 60 x 55 mm, Wheal Phoenix Mine, Linkinhorne, Cornwall, UK. From Mike Merry 2018. |
Phoenix chalcosiderite |
Pharmacosiderite, 57 x 47 x 37 mm, Wheal Gorland |
Childrenite in gemmy crystals to 4 mm, near Tavistock, Devon, with several old labels, 65 x 50 x 40 mm. |
Childrenite detail of 3 mm crystal |
Childrenite crystal model |
Wavellite variscite Devon.jpg |
Devon wavellite detail, field of view 14 mm |
Sowerby's wavellite illustration, 1805 |
Pyromorphite, Fowy Consols |
Pyromorphite, Fowy Consols |
Turquoise var Rashleighite and Varlamoffite, 12 cm, Bunny Mine (Engine Shaft old dump), St. Austell, Cornwall. |
Orthoclase, altered to sericite and kaolinite, Carlsbad twin, 37mm, Melbur Clay Pit, Cornwall. |
Published cassiterite pseudomorph after Carlsbad twinned orthoclase, 37 mm long. 1828 find, Wheal Coates, St Agnes, Cornwall. |
Published cassiterite pseudomorph after Carlsbad twinned orthoclase, 37 mm long. 1828 find, Wheal Coates, St Agnes, Cornwall. |
Cassiterite after orthoclase Carlsbad twin, 2 cm, Wheal Coates |
Chalcedony after fluorite octahedra, 12 x 9 x 3 cm, Wheal Mary Ann. |
Woolley Farm, Bovey Tracey, Devon. Schorl to 3 cm and apatite prisms to 7 mm. |
Crystal model for Bovey Tracey schorl |
Sowerby 1817 v5 Bovey schorl illustration |
Quartz, doubly terminated on siderite, Huel Maudlin, ca 1819, ex Heuland |
Sharp lustrous colourless datolite crystals, Parc Bean Cove, Mullion |
2 cm sharp complete axinite crystal from Meldon Quarry, Devon, on 8 cm matrix. |
Crystal model for Meldon axinite |
Galena on quartz from Herodsfoot Mine |