I found a strangely shaped stone. Is it from another planet? Help me find out. It is perfectly even, heavy, and cannot be broken by anything. What is it?

 
I found a strangely shaped stone. Is it from another planet? Help me find out. It is perfectly even, heavy, and cannot be broken by anything. What is it? - My, Picture with text, Geology, Natural stones, Eggs, Oddities, Dacha, Question, Ask Peekaboo, Problem, Need advice, Short post, Longpost
I found a strangely shaped stone. Is it from another planet? Help me find out. It is perfectly even, heavy, and cannot be broken by anything. What is it? - My, Picture with text, Geology, Natural stones, Eggs, Oddities, Dacha, Question, Ask Peekaboo, Problem, Need advice, Short post, Longpost


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