Simple, we weren't around during that time, so we made theories and conclusions to when life evolved on earth.
Answer:
zircons
Explanation:
The Jack Hills Zircon is believed to be the oldest geological material ever found on Earth, dating back to about 4.375 billion years, give or take 6 million years – the zircons are not technically rocks, but we felt that they should be included on this list.
PLEASE MARK BRAINLYEST