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Quartz : SiO2, Goethite : α-Fe3+O(OH) | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Goethite coated by specular hematite and quartz crystals, intergrown with quartz. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3249 View Count: 521 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz crystal > 2mm showing modified cube habit, on dolomite with specular hematite. Colleen Thomson photo and specimen. |
| © Colleen Thomson | Photo ID: 3229 View Count: 463 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK 'phantom' Quartz crystal > 4mm showing several growth phases. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3241 View Count: 446 |
Quartz : SiO2, Goethite : α-Fe3+O(OH) | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz xl > 4mm,(on goethite) with limonite inclusions showing 'phantom' growth pattern. |
| © Colleen Thomson | Photo ID: 3228 View Count: 440 |
Quartz (Var: Smoky Quartz) : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz (var smoky quartz) to 15mm. Ian Jones collection, collected July 1997. |
| © Ian Jones | Photo ID: 5463 View Count: 417 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Ferruginous Quartz crystals on limonite. Field of view 15mm. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3247 View Count: 407 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz intergrown with hematite coated goethite. Field of view 5mm. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3248 View Count: 407 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz xls with limonite inclusions showing growth pattern. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3243 View Count: 398 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK Quartz xl with intergrown hematite covered goethite, with secondary quartz. Main crystal >3mm. Colleen Thomson photo & collection. |
| © Colleen Thomson | Photo ID: 3246 View Count: 355 |
Quartz : SiO2 | |
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Ton Mawr Quarry, Taff's Well, Cardiff (Mid Glamorgan; Glamorgan), Wales, UK 3cm long quartz cavity with a slight purple tint in goethite. |
| © Christine Rust | Photo ID: 15047 View Count: 309 |
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