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If you're in the USA or Canada probably here. If you're in the EU maybe here. I still think you should start with a Norton 4/8. :shrug: :gl:

I've got the single grit Nortons (not the combination stone) and I love the 8K. I think in their brochure it said that the 8 is a natural stone quarried in Italy but I am not sure and I can't find...