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All speculation, no one knows for sure

And on what bases you r saying this

Someplace in Russia dig down to like 8 miles or close to it and that is as deep as we have ever been

You want to say no magnam ,stones ,lava found inside earth

I'm saying the core is all a guess because there is no way to get there to explore. All the molten core stuff is a guess. Volcanoes do release lava but it is possible that that is local to the volcano and not coming from the center or bottom etc. scientists guess and tell people it's fact.