Head West young man to the granite!
There are some spectacular mineral lodes in the region, if they liked tin or copper there are usually some cool metal minerals - though the site of the old mine which produced a unique, gorgeous fluorescent uranium phosphate mineral called torbenite is now under a football pitch. Which may be a good thing…
The North of Cornwall is generally mineralogical dull as it is nothing more than a pile of folded mud - though the folding is spectacular - and there are almost no good fossils.
Although I should point out that Megilligar is now protected as a site of special scientific interest and it is illegal to collect samples.
