This is a pallasite meteorite a rare slice of an ancient asteroid believed to have formed between its metallic core and rocky mantle over 4.5 billion years ago.
Those glowing crystal sections are olivine, meaning you’re looking at the shattered inner remains of a lost world from the dawn of our solar system.
The comment reply to one of your comment replies explains it. Yes, to some degree, it's really the "last formed" date, but everything besides helium and hydrogen atoms had to be formed over time after the big bang by fusing inside stars. Even carbon.
https://lemmyverse.link/lemmy.zip/comment/26154715