Where was the oldest known Earth rock found?

Commonly named "Big Bertha", the Lunar Sample 14321 is a chunk of our closest satellite, the Moon, encapsulating a 4 billions years old meteorite originated from Earth, during its formation.

The meteor embedded in Big Bertha had traces of quartz, granite and feldspar, highly common rocks and minerals on Earth but very scarcely found on the moon, this made scientist believe that the rock was actually a chunk of our planet that flung to the moon during the Hadean eon, when the Earth was a huge, molten rock that attracted asteroids all around and got continuously impacted by celestial bodies for millions of years.

The sample was collected and brought back on our planet by the Apollo 14 crew in 1971, formed by the astronauts Alan B. Shepard Jr., Stuart A. Roosa and Edgar D. Mitchell. It was the third crewed Apollo mission to land on the moon and the first to land on the "bright lands" of the Moon, called the "Highlands" or Terrae, opposed to the Maria, the darkest patches of the Moon.