The oldest physical objects currently sitting on Earth share a bizarre paradox: they are 2.5 billion years older than the planet itself.
In 1969, a 220-pound meteorite broke apart and fell over the town of Murchison in Victoria, Australia. When scientists analyzed the fragments, they found them peppered with microscopic grains of silicon carbide. These "presolar grains" are literal stardust—particles forged in the cooling gas of dying stars before the solar system even existed. In 2020, researchers dated the grains found in the Murchison meteorite to roughly 7 billion years old, making them older than the Sun.
However, if you restrict the definition to terrestrial objects—things that actually formed here on Earth—the title belongs to a collection of microscopic crystals in Western Australia known as the Jack Hills zircons. Earth formed about 4.54 billion years ago, initially as a hellish sphere of molten magma. Just 160 million years later, the Jack Hills zircons crystallized. Dated to 4.4 billion years old, these tiny, incredibly durable fragments survived billions of years of tectonic recycling, proving that solid crust and possibly liquid water existed much earlier in the planet's history than previously believed.
For something you can actually hold in your hand—an intact rock rather than a microscopic crystal—the prize goes to the Acasta Gneiss. Located along a remote river in the Northwest Territories of Canada, this body of metamorphosed granite dates back 4.03 billion years, making it the oldest known surviving piece of the Earth's original crust.