Hello there, I recently found, whilst walking the dog, a weathered rock that just didn’t fit right in the countryside. In the county of Cambridgeshire, UK there are no ingeous rocks, only peat, clay and sand & gravel underneath. It had been hit many times by the plough and recently lots too but was obviously very hard and had suffered very little from it. I realised a farmer must have thrown it out of the field and it hadn’t landed where I had found it. It seemed to have once had a crust that had been over it, some still remains but light in colour and there was obvious small rust spots he