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UK | |
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| [Chalcedony var. Agate] |
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| [var. Smoky Quartz] |
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| [var. Smoky Quartz] Paul Nicholson Collection |
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| |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| [var. Smoky Quartz] [Specimen in the Natural History Museum, London] |
|
| [var. Amethyst] |
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| [Chalcedony var. Agate] |
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| [var. Smoky Quartz] |
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| Wilson, M.J., J.D. Russell, J.M. Tait, D.R. Clark, and A.R. Fraser (1984): Macaulayite, a new mineral from north-east Scotland. Mineral. Mag., 48, 127-129. |
|
| [var. Amethyst] |
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| [var. Smoky Quartz] |
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| [var. Smoky Quartz] |
|
| [var. Amethyst] |
|
| [var. Smoky Quartz] |
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| Wilson, A. C. (1975) An occurrence of sapphire in the Land's End Granite, Cornwall. Bulletin of the Geological Survey of Great Britain 52, Geological Survey of Great Britain. 61-64 |
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| Parnell, John, Temitope O. Akinsanpe, John W. Still, Andrea Schito, Stephen A. Bowden, David K. Muirhead, and Joseph G. T. Armstrong. (2023) "Low-Temperature Fluorocarbonate Mineralization in Lower Devonian Rhynie Chert, UK" Minerals 13, no. 5: 595. https://doi.org/10.3390/min13050595 |
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| [Chalcedony var. Agate] |
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| [var. Amethyst] |
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| [Chalcedony var. Agate] |
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| Jackson, Brian. (1982). An Occurrence of Gem Quality Elbaite from Glenbuchat, Aberdeenshire, Scotland. The Journal of Gemmology. 18. 121-125. 10.15506/JoG.1982.18.2.121. |
Barras Quarry, Bruxie Hill, Stonehaven, Aberdeenshire, Scotland, UK