Mystery of the diamond-bearing meteorites is SOLVED: Rare space rocks came from an ancient dwarf planet that smashed into a giant asteroid 4.5 billion years ago, study finds


An ancient dwarf planet of our solar system likely smashed into a giant asteroid about 4.5 billion years ago, which resulted in huge temperatures and moderate pressures. These conditions caused graphite contained in the space rock to undergo a process that turned it into lonsdaleite – a rare hexagonal form of diamond© Provided by Daily Mail

Finally, the riddle surrounding the diamond-containing meteorites discovered all around the world has been cleared out.
Australian researchers from RMIT and Monash University have found that the diamonds originated from a long-gone dwarf planet from our solar system.
Around 4.5 billion years ago, the planet probably collided with a large asteroid, creating extremely high temperatures and moderate pressures.
These circumstances led to the transformation of the space rock’s graphite into lonsdaleite, a rare hexagonal type of diamond.
As the planet cooled and the pressure dropped, this was then largely replaced by ordinary diamond, which is a tetrahedral lattice of carbon atoms.
Geologist and principal author Professor Andy Tomkins said: “Nature has thus given us a technique to try and mimic in human-made systems.”
If we can create an industrial method that encourages the replacement of pre-shaped graphite pieces with lonsdaleite, we believe that lonsdaleite might be utilized to create tiny, ultra-hard machine parts.

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