This chunk of rock was formed long before the British Isles took shape, before dinosaurs roamed the Earth... in fact before life itself began.
It is the biggest meteorite ever to fall on Britain or Ireland in recorded history, and it is currently on view in Belfast.
The Brasky meteorite weighs in at around 27kg, and is estimated to be 4.57 billion years old by Mike Simms, geologist at National Museums Northern Ireland.
According to scientific estimates, this is roughly the same sort of time that the Earth itself was beginning to form.
Although a bigger meteorite has been discovered, weighing around 90kg and found not far from the house of rock star Sting in Wiltshire, it is believed to have fallen tens of thousands of years ago.
The Brasky meteorite fell to Earth in Limerick on September 10, 1813, and to commemorate this 200th anniversary it will be on display in the Ulster Museum until November 3.
It is basically an unchanged relic of the early solar system said Dr Simms, which had just been drifting through space.
He said: “It’s older than any rock on Earth, because all the rocks on Earth have been recycled through volcanic activity.”
This is the first time it has been on display in Northern Ireland, he added.
There will also be a “meteorite day” on November 2, when Dr Simms will be on hand to answer any questions about it, and when members of the public are invited to bring in any possible space-rock specimens.
All examples he has seen so far have just turned out to be hunks of plain stone, which he calls “meteor-wrongs”.
But, he added: “I live in hope.”
The fact that the Brasky meteorite fell to Earth while there were people around to see it means that its fiery plummet was actually recorded.
A nameless farmhand gave an account of the falling object whistling past him and ploughing into the ground, boring a two-feet-deep hole.
“He didn’t seem terribly alarmed, just from the way it was described,” said Dr Simms, who added that people were probably “more stiff upper-lipped in those days!”.
It was only a couple of decades before that when it had become scientifically accepted that meteorites fall from space, added Dr Simms.
Before that, it was believed to be a weather phenomenon.
“It gives you an idea of what’s out there in space – and that it can land anytime, anywhere, without warning,” he said.
At first glance, Brasky may look simply like a dark stone.
But its surface is pock-marked with holes “almost like someone has been pressing their thumbs into it”.
These were burned into it as it flew through the atmosphere at terrific temperatures.
Unlike almost all terrestrial rocks, inside the meteorite are pure shards of iron.
But this means that, ever since it landed on Earth, Brasky has been slowly succumbing to rust.