![Cinnabar. Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire, UK.](https://a4.pbase.com/g2/41/984841/3/148646079.4YbULFBa.jpg) Cinnabar. Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire, UK. |
![Marcasite crystals, replaced by goethite, to 3 mm on 25 mm matrix of baryte and calcite. Tenter Hill, Bramham, W Yorkshire.](https://a4.pbase.com/g2/41/984841/3/149663084.kjnZHlHE.jpg) Marcasite crystals, replaced by goethite, to 3 mm on 25 mm matrix of baryte and calcite. Tenter Hill, Bramham, W Yorkshire. |
![Galena and baryte, Hungry Hushes/Chert Mine, Langthwaite, Arkengarthdale, North Yorkshire](https://a4.pbase.com/g12/41/984841/3/171554999.xtlYmhSZ.jpg) Galena and baryte, Hungry Hushes/Chert Mine, Langthwaite, Arkengarthdale, North Yorkshire |
![Fluorite, cubes to 44 mm across, with elongate pyrite inclusions. East Flatt, Ray Gill Mine, Hawes, Wensleydale, Yorkshire.](https://a4.pbase.com/g9/41/984841/3/149230358.D12XEVYb.jpg) Fluorite, cubes to 44 mm across, with elongate pyrite inclusions. East Flatt, Ray Gill Mine, Hawes, Wensleydale, Yorkshire. |
![Pyrite inclusions Raygill Mine, FOV about 6 mm.](https://a4.pbase.com/g2/41/984841/3/149343394.Lq6UymzR.jpg) Pyrite inclusions Raygill Mine, FOV about 6 mm. |
![Pyrite inclusions Raygill, FOV a little less than 2 mm. Note the comparable microstratigraphies of widening and narrowing.](https://a4.pbase.com/g2/41/984841/3/149343403.Bgf1uzxq.jpg) Pyrite inclusions Raygill, FOV a little less than 2 mm. Note the comparable "microstratigraphies" of widening and narrowing. |
![Fluorite, cubes to 44 mm across, with elongate pyrite inclusions. East Flatt, Ray Gill Mine, Hawes, Wensleydale, Yorkshire.](https://a4.pbase.com/g2/41/984841/3/149230359.RG7YIhFq.jpg) Fluorite, cubes to 44 mm across, with elongate pyrite inclusions. East Flatt, Ray Gill Mine, Hawes, Wensleydale, Yorkshire. |
![Colour-zoned fluorites to 5 mm, Seata Mine, Aysgarth, Wensleydale, N Yorkshire.](https://a4.pbase.com/g10/41/984841/3/145961910.mQFNUyk0.jpg) Colour-zoned fluorites to 5 mm, Seata Mine, Aysgarth, Wensleydale, N Yorkshire. |
![Seata fluorite colour-banding and sulphide inclusions. The cubes have beautiful trapezohedral modifications to the corners.](https://a4.pbase.com/g1/41/984841/3/145962289.vYy0vCPw.jpg) Seata fluorite colour-banding and sulphide inclusions. The cubes have beautiful trapezohedral modifications to the corners. |
![Seata fluorite detail of tiny sharp sulphide inclusions](https://a4.pbase.com/g1/41/984841/3/145962290.RwyvJ7x3.jpg) Seata fluorite detail of tiny sharp sulphide inclusions |
![Colourless fluorite cubes to 18 mm, Coldstones Quarry, Greenhow, Yorkshire, England.](https://a4.pbase.com/g2/41/984841/3/147122393.uo8s93O2.jpg) Colourless fluorite cubes to 18 mm, Coldstones Quarry, Greenhow, Yorkshire, England. |
![A beautiful inky blue fluorite, 43 mm across, Elbolton Mine, Grassington, Wharfedale, North Yorkshire.](https://a4.pbase.com/g9/41/984841/3/147740559.qmla4m5b.jpg) A beautiful inky blue fluorite, 43 mm across, Elbolton Mine, Grassington, Wharfedale, North Yorkshire. |
![Elbolton fluorite crystal with backlighting](https://a4.pbase.com/g9/41/984841/3/159830424.piv11wOD.jpg) Elbolton fluorite crystal with backlighting |
![Very lustrous yellow fluorite in cubes to 15 mm, Great Sled Dale Mine, Keld, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145961902.cGnBtfJu.jpg) Very lustrous yellow fluorite in cubes to 15 mm, Great Sled Dale Mine, Keld, N Yorkshire. |
![Fluorite, lilac cubes to 5 mm with trapezohedral corner modifications. Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147395759.nHzUrKCT.jpg) Fluorite, lilac cubes to 5 mm with trapezohedral corner modifications. Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire. |
![Fluorite crystals to 2 cm on 5 cm matrix. Gill Heads Mine, Appletreewick, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/148274971.vkGzPeXF.jpg) Fluorite crystals to 2 cm on 5 cm matrix. Gill Heads Mine, Appletreewick, N Yorkshire. |
![Fluorite crystals to 2 cm on edge, 8 cm specimen. Gill Heads Mine, Trollers Gill, Appletreewick, N Yorkshire, England, UK.](https://a4.pbase.com/g9/41/984841/3/151511960.2d7z3XKg.jpg) Fluorite crystals to 2 cm on edge, 8 cm specimen. Gill Heads Mine, Trollers Gill, Appletreewick, N Yorkshire, England, UK. |
![Fluorite, Great Sleddale, 4 mm crystal on 3 cm matrix.](https://a4.pbase.com/g10/41/984841/3/167617360.FiuzrQgx.jpg) Fluorite, Great Sleddale, 4 mm crystal on 3 cm matrix. |
![Fluorite corner Great Sleddale, 4 mm crystal on 3 cm matrix.](https://a4.pbase.com/g2/41/984841/3/148610162.jPqew91s.jpg) Fluorite corner Great Sleddale, 4 mm crystal on 3 cm matrix. |
![Fluorite detail, Great Sleddale, showing cube, hexoctahedron, trapezohedron and octahedron faces, plus unknown form.](https://a4.pbase.com/g2/41/984841/3/148610163.3TdRo3ph.jpg) Fluorite detail, Great Sleddale, showing cube, hexoctahedron, trapezohedron and octahedron faces, plus unknown form. |
![Great Sleddale fluorite crystal model](https://a4.pbase.com/g10/41/984841/3/167617362.sTJEzZBV.jpg) Great Sleddale fluorite crystal model |
![Great Sleddale fluorite crystal model](https://a4.pbase.com/g10/41/984841/3/167617361.0qCEpUE0.jpg) Great Sleddale fluorite crystal model |
![Calcite, 42 mm, Wetgrooves Mine, Aysgarth, Wensleydale, North Yorkshire.](https://a4.pbase.com/g10/41/984841/3/147182778.uOU86onv.jpg) Calcite, 42 mm, Wetgrooves Mine, Aysgarth, Wensleydale, North Yorkshire. |
![25 mm complex stack of calcite crystals on 6 cm matrix. Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire, UK.](https://a4.pbase.com/g9/41/984841/3/148646078.lc4Y7Bm8.jpg) 25 mm complex stack of calcite crystals on 6 cm matrix. Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire, UK. |
![Calcite crystals to 35 mm in 7 cm group. Raygill Mine, Hawes, Wensleydale, N Yorkshire.](https://a4.pbase.com/g10/41/984841/3/147395294.mdqmRrT1.jpg) Calcite crystals to 35 mm in 7 cm group. Raygill Mine, Hawes, Wensleydale, N Yorkshire. |
![Doubly terminated 11 mm calcite on 28 mm matrix. Wormald Green Quarry, Ripon, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147761522.J0NI3aW2.jpg) Doubly terminated 11 mm calcite on 28 mm matrix. Wormald Green Quarry, Ripon, N Yorkshire. |
![Calcite rhombohedra to 19 mm in 3 cm group, Seata Mine, Aysgarth, Wensleydale.](https://a4.pbase.com/g9/41/984841/3/153989039.kAfe4h86.jpg) Calcite rhombohedra to 19 mm in 3 cm group, Seata Mine, Aysgarth, Wensleydale. |
![Yorkshire strontianite on quartz, Gunnerside Gill, Swaledale](https://a4.pbase.com/g12/41/984841/3/170154551.AWtVVKKv.jpg) Yorkshire strontianite on quartz, Gunnerside Gill, Swaledale |
![33 mm strontianite crystal group, Hard Level, Old Gang Mines, Swaledale.](https://a4.pbase.com/g1/41/984841/3/146614137.bHb8BQ7t.jpg) 33 mm strontianite crystal group, Hard Level, Old Gang Mines, Swaledale. |
![Strontianite crystals on fluorite with sphalerite, cerussite and chalcopyrite. Old Gang Mines, Reeth, Swaledale, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146158499.fStKMkpF.jpg) Strontianite crystals on fluorite with sphalerite, cerussite and chalcopyrite. Old Gang Mines, Reeth, Swaledale, N Yorkshire. |
![Fluorite twin (with complex corner modifications), 5 mm, with azurite and malachite, Great Sled Dale Mine, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146047454.fkjTN8AH.jpg) Fluorite twin (with complex corner modifications), 5 mm, with azurite and malachite, Great Sled Dale Mine, N Yorkshire. |
![Sprays of acicular malachite crystals on 3 cm matrix, Great Sled Dale Mine, Keld, Swaledale, North Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146047549.W5UPLFWn.jpg) Sprays of acicular malachite crystals on 3 cm matrix, Great Sled Dale Mine, Keld, Swaledale, North Yorkshire. |
![Azurite with fluorite and malachite, field of view approximately 1.5 mm, Great Sled Dale Mine, Keld, Swaledale, North Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146009941.Yxp5FWoi.jpg) Azurite with fluorite and malachite, field of view approximately 1.5 mm, Great Sled Dale Mine, Keld, Swaledale, North Yorkshire. |
![Malachite, Black Hills level, Black Hills, Arkengarthdale, North Yorkshire, 2 cm](https://a4.pbase.com/g9/41/984841/3/159830488.4ZCjXq6d.jpg) Malachite, Black Hills level, Black Hills, Arkengarthdale, North Yorkshire, 2 cm |
![Smithsonite crystals on 35 mm matrix, Moulds Level, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147328082.1Qp06DPn.jpg) Smithsonite crystals on 35 mm matrix, Moulds Level, Arkengarthdale, N Yorkshire. |
![Smithsonite crystals on fluorite, Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145961905.Xe3gS66T.jpg) Smithsonite crystals on fluorite, Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire. |
![Smithsonite crystals on fluorite, Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145962031.YDiLbLE8.jpg) Smithsonite crystals on fluorite, Coldstones Quarry, Greenhow, Pately Bridge, N Yorkshire. |
![Smithsonite on fluorite, Coldstones Quarry, Pateley Bridge, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147195515.oBRTrXJv.jpg) Smithsonite on fluorite, Coldstones Quarry, Pateley Bridge, North Yorkshire. |
![Smithsonite crystals on fluorite, Underedge Level, Sunside Mine, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145961906.yEcAme2X.jpg) Smithsonite crystals on fluorite, Underedge Level, Sunside Mine, Arkengarthdale, N Yorkshire. |
![Yellow-centered smithsonite crystals on fluorite, Underedge Level, Sunside Mine, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145962455.Te2K4w6E.jpg) Yellow-centered smithsonite crystals on fluorite, Underedge Level, Sunside Mine, Arkengarthdale, N Yorkshire. |
![7 cm specimen of botryoidal lilac smithsonite, Middlesmoor, Kettlewell, Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146591493.g0isZEh2.jpg) 7 cm specimen of botryoidal lilac smithsonite, Middlesmoor, Kettlewell, Yorkshire. |
![Smithsonite on fluorite. Birds Cross Hush, Northside Mines, Arkengarthdale, North Yorkshire, UK.](https://a4.pbase.com/g9/41/984841/3/148646080.YH0Zay0I.jpg) Smithsonite on fluorite. Birds Cross Hush, Northside Mines, Arkengarthdale, North Yorkshire, UK. |
![Smithsonite on barite, 2 cm specimen. Underedge Level, Moulds Side, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g9/41/984841/3/148087792.FwE64kBD.jpg) Smithsonite on barite, 2 cm specimen. Underedge Level, Moulds Side, Arkengarthdale, N Yorkshire. |
![Chaytor Rake smithsonite](https://a4.pbase.com/g12/41/984841/3/171789247.juOPpnrO.jpg) Chaytor Rake smithsonite |
![Grinton smithsonite](https://a4.pbase.com/g12/41/984841/3/171789249.MyRd83yT.jpg) Grinton smithsonite |
![Rosasite sphere, a little over 1 mm diameter, Old Gang Mine, Reeth, Swaledale, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145962130.V6E6VdWa.jpg) Rosasite sphere, a little over 1 mm diameter, Old Gang Mine, Reeth, Swaledale, N Yorkshire. |
![Aurichalcite on 9 cm matrix of calcite crystals, Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire.](https://a4.pbase.com/g9/41/984841/3/146334352.XvBm1M08.jpg) Aurichalcite on 9 cm matrix of calcite crystals, Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire. |
![Detail of Wetgrooves aurichalcite.](https://a4.pbase.com/g9/41/984841/3/157692494.QlzKP72o.jpg) Detail of Wetgrooves aurichalcite. |
![Wetgrooves Cu Secondary mineral (probably aurichalcite) coating a galena cuboctahedron, with fluorite.](https://a4.pbase.com/g1/41/984841/3/145973639.4wRa5xUb.jpg) Wetgrooves Cu Secondary mineral (probably aurichalcite) coating a galena cuboctahedron, with fluorite. |
![Barytocalcite blades with sphalerite. Crackpot Hall Mine, Yorkshire, UK.](https://a4.pbase.com/g9/41/984841/3/150267505.aUDN3lOq.jpg) Barytocalcite blades with sphalerite. Crackpot Hall Mine, Yorkshire, UK. |
![Barite after dipyramidal witherite on 7 cm matrix. Sleigill, Arkengarthdale, North Yorkshire.](https://a4.pbase.com/g1/41/984841/3/146278760.8lslw8Yf.jpg) Barite after dipyramidal witherite on 7 cm matrix. Sleigill, Arkengarthdale, North Yorkshire. |
![Spear-shaped barite crystals to 5 cm long, Wetgrooves Mine, Wensleydale, Yorkshire.](https://a4.pbase.com/g9/41/984841/3/148076806.AgeIuoG9.jpg) Spear-shaped barite crystals to 5 cm long, Wetgrooves Mine, Wensleydale, Yorkshire. |
![Barite crystals with calcite, fluorite and aurichalcite on sphalerite, Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire.](https://a4.pbase.com/g1/41/984841/3/145963119.KIIxDusd.jpg) Barite crystals with calcite, fluorite and aurichalcite on sphalerite, Wetgrooves Mine, Askrigg, Wensleydale, N Yorkshire. |
![Pristine galena cuboctahedra and a colourless fluorite cube seen through the window of a 5 mm Wetgrooves barite crystal.](https://a4.pbase.com/g1/41/984841/3/145973200.0mUy8ZQm.jpg) Pristine galena cuboctahedra and a colourless fluorite cube seen through the window of a 5 mm Wetgrooves barite crystal. |
![Baryte, 3mm chisel-shaped crystal on 28 mm matrix, How Bank Level, Wetgrooves, Askrigg, Wensleydale, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147395439.45dGHnEV.jpg) Baryte, 3mm chisel-shaped crystal on 28 mm matrix, How Bank Level, Wetgrooves, Askrigg, Wensleydale, N Yorkshire. |
![6 cm barite specimen from the Old Rake Vein, Hard level, Old Gang Mines, Reeth, Swaledale, North Yorkshire, England, UK.](https://a4.pbase.com/g4/41/984841/3/145311370.93XwIYzX.jpg) 6 cm barite specimen from the Old Rake Vein, Hard level, Old Gang Mines, Reeth, Swaledale, North Yorkshire, England, UK. |
![Black Whim calcite and baryte after witherite](https://a4.pbase.com/g2/41/984841/3/147330327.FVx0xBPm.jpg) Black Whim calcite and baryte after witherite |
![Cerussite twins to 5 mm, Brandy Bottle Incline, Swaledale, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147211785.ldcGBYdg.jpg) Cerussite twins to 5 mm, Brandy Bottle Incline, Swaledale, North Yorkshire. |
![Cerussite twins to 3 mm, Brandy Bottle Incline, Swaledale, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147329274.dOozc7MI.jpg) Cerussite twins to 3 mm, Brandy Bottle Incline, Swaledale, North Yorkshire. |
![Cerussite twins to 3 mm, Brandy Bottle Incline, Swaledale, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147329275.4cJ8j7rm.jpg) Cerussite twins to 3 mm, Brandy Bottle Incline, Swaledale, North Yorkshire. |
![Brandygill cerussite 1.jpg](https://a4.pbase.com/g9/41/984841/3/163160652.rvAkhQ9d.jpg) Brandygill cerussite 1.jpg |
![5 cm group of lustrous baryte crystals to 1 cm, Damrigg Mine, Arkengarthdale, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/146794518.gPOQcdLf.jpg) 5 cm group of lustrous baryte crystals to 1 cm, Damrigg Mine, Arkengarthdale, North Yorkshire. |
![4 cm group of sharp white lustrous barite crystals to 23 mm. Dam Rigg Level, Northside Mines, Arkengarthdale, North Yorkshire](https://a4.pbase.com/g2/41/984841/3/147779795.QR0mB6aq.jpg) 4 cm group of sharp white lustrous barite crystals to 23 mm. Dam Rigg Level, Northside Mines, Arkengarthdale, North Yorkshire |
![5 cm group of baryte crystals to 15 mm long. Justice Level, Whaw, Arkengarthdale, N Yorkshire](https://a4.pbase.com/g2/41/984841/3/146591494.sdQaxysI.jpg) 5 cm group of baryte crystals to 15 mm long. Justice Level, Whaw, Arkengarthdale, N Yorkshire |
![Pyromorphite crystals on baryte, 6 cm specimen, Hungry Hushes, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g9/41/984841/3/153503421.4ZImTDMg.jpg) Pyromorphite crystals on baryte, 6 cm specimen, Hungry Hushes, Arkengarthdale, N Yorkshire. |
![Pyromorphite crystals on baryte, 6 cm specimen, Hungry Hushes, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147328081.MIMV10kU.jpg) Pyromorphite crystals on baryte, 6 cm specimen, Hungry Hushes, Arkengarthdale, N Yorkshire. |
![Pyromorphite, Old Rake](https://a4.pbase.com/g12/41/984841/3/171743900.x8NOaHRG.jpg) Pyromorphite, Old Rake |
![9 cm specimen of gemmy boracite crystals to 3 mm across with minor hilgardite. Boulby mine, Cleveland, Yorkshire](https://a4.pbase.com/g10/41/984841/3/167038108.J8wgNfR5.jpg) 9 cm specimen of gemmy boracite crystals to 3 mm across with minor hilgardite. Boulby mine, Cleveland, Yorkshire |
![Boulby boracite with Hilgardite detail](https://a4.pbase.com/g10/41/984841/3/167038110.frGGeExc.jpg) Boulby boracite with Hilgardite detail |
![Boulby Hilgardite on boracite detail](https://a4.pbase.com/g10/41/984841/3/167038111.VciWGWsq.jpg) Boulby Hilgardite on boracite detail |
![Boulby Hilgardite on boracite detail](https://a4.pbase.com/g10/41/984841/3/167038112.Wn2TGIdd.jpg) Boulby Hilgardite on boracite detail |
![Boulby Boracite crystals showing cube, tetrahedron and decahedron faces (stacked)](https://a4.pbase.com/g13/41/984841/3/167050757.3335f08b.JPEG) Boulby Boracite crystals showing cube, tetrahedron and decahedron faces (stacked) |
![Boulby boracite crystal model](https://a4.pbase.com/g10/41/984841/3/167050758.Dt8HPez5.jpg) Boulby boracite crystal model |
![Boulby Mine magnesite crystals on boracite FOV 4 mm](https://a4.pbase.com/g10/41/984841/3/167203583.sH8fwhI1.jpg) Boulby Mine magnesite crystals on boracite FOV 4 mm |
![Boulby magnesite crystal model](https://a4.pbase.com/g10/41/984841/3/167203588.VKMLo5Ov.jpg) Boulby magnesite crystal model |
![Boulby magnesite crystal model](https://a4.pbase.com/g10/41/984841/3/167203590.cU3JwUhq.jpg) Boulby magnesite crystal model |
![Volkovskite crystals, 77 x 33 x 28 mm, Boulby Mine, Loftus, North Yorkshire](https://a4.pbase.com/g12/41/984841/3/171743898.Pe5JcggX.jpg) Volkovskite crystals, 77 x 33 x 28 mm, Boulby Mine, Loftus, North Yorkshire |
![Szaibelyite on hilgardite, Boulby Mine, Loftus, North Yorkshire](https://a4.pbase.com/g12/41/984841/3/172273452.AU3foQxB.jpg) Szaibelyite on hilgardite, Boulby Mine, Loftus, North Yorkshire |
![Hemimorphite crystals, detail of 42 mm specimen from Tanner Rake, Arkengarthdale, N Yorkshire.](https://a4.pbase.com/g9/41/984841/3/152838848.ELN3DiSt.jpg) Hemimorphite crystals, detail of 42 mm specimen from Tanner Rake, Arkengarthdale, N Yorkshire. |
![Hemimorphite on baryte, Barras End Mine, Melbeeks Moor, North Yorkshire.](https://a4.pbase.com/g2/41/984841/3/147195956.qkjuJWoF.jpg) Hemimorphite on baryte, Barras End Mine, Melbeeks Moor, North Yorkshire. |