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AlbertBowden
Hello guys,

I have been visiting Swanage beach in Dorset, the Jurassic coast and have found these strange orange/white stone things. I find them trapped inside a white rock. When the rock reacts with water it starts to turn into a clay substance, making it easier to remove. The orange/white stone thing is trapped inside the rock and is completely visible. When I hammer it out, it falls out like clay. I have a lot of samples to show you in the pictures below. Please could anyone identify what they are? They have a circular light grey crystal pattern in the middle. They are in many shapes and sizes as shown but there is one stuck in the rock and it was in a shape of a line. I was able to easily remove it in its full shape.

Thanks!

Please let me know if you need more information. Click image for larger version - Name: image.jpg, Views: 29, Size: 636.88 KB Click image for larger version - Name: image.jpg, Views: 34, Size: 343.08 KB Click image for larger version - Name: image.jpg, Views: 35, Size: 374.99 KB Click image for larger version - Name: DBF2590D-3A9A-42FC-AB39-29228B90845E.jpeg, Views: 33, Size: 392.34 KB
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prep01
Hello Albert, These are nodules of Marcasite (FeS), encased in a covering of Limonite which forms around it  - a compound formed with the chalk in which the Marcasite was formed 75 - 85 million years ago.
Colin Huller
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