The necklace represents the image of a knocked McGregor who went viral in the MMA world in January when Poirier won the summit in Abu Dhabi.
The rivals then met again, a third time, last weekend and that time McGregor broke his shin and Poirier was awarded the victory via technical knockout.
It is the controversial American Jake Paul - the Disney actress who became one of the world's greatest Youtube personalities and who is now trying his hand at a boxing career - who has had the necklace he calls "Sleepy McGregor" made.
According to Paul, the value is closer to SEK 900,000.
Right: Conor McGregor knocked out in January.
Left: The necklace that will now be auctioned off.
Photo: Twitter / Viaplay
After Poirier's victory this weekend, Paul sent the necklace to the MMA star who has now received it and promises to auction it off for charity.
"We will do something big in Lafayette for this money," Poirier wrote, referring to his hometown.
Dustin Poirier runs the charity "The Good Fight Foundation" with his wife Jolie.
Among other things, they auction off memorabilia from the fighter's career and help children and schools in the Louisiana area.
CLIP: McGregor: "I went into the game injured and the UFC knew about it"
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The situation where Conor McGregor breaks his leg.
Seconds later, the match against Dustin Poirier is over.
Photo: Bildbyrån