Even with today's most highly advanced technology, we could not create an object like this if we tried.

 

"It's just a vase!" you say. "Archaeologists in Egypt have found literally thousands of them," you say.  Ah, but there is something rather unusual about these 5,000-year-old Egyptian vases. They are made of diorite, one of the planet's hardest minerals. Diorite is so hard it is sometimes used to work granite.

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How can it be that pre-dynastic ancient Egyptians were able to fashion hollow vases from blocks of diorite? No one knows.

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In his book Lost Technologies of Ancient Egypt, Christopher Dunn theorizes that ancient Egyptians possessed incredible machine tooling technology for the precision cutting of enormous pyramid stones and perfectly-formed statues.  Perhaps similar technology was used to create everyday objects like this diorite vase.

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That's one theory.  Another, discussed in The Pyramids: An Enigma Solved by John Davidovits, is that the ancient Egyptians had developed geopolymers, liquid or semi-liquid substances that hardened into synthetic stone.  Could it be that a geopolymer version of diorite was poured into molds to create this vase and thousands of others like it?