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But beyond that, we can't know much for sure. The first thing we should ask is what the stones themselves tell us. The ones in the outer ring are mostly a local type of sandstone, but the builders also used foreign stones called Bluestones. These tend to be smaller and makeup Stonehenge in a ring, all smaller than the sandstones 【that is】 but still massive. The Bluestones each weighed around four tons and… is there a question?