2Pac's self-designed crown ring is set to auctioned by Sotheby's in honor of Hip-Hop's 50th anniversary.

The auction will take place on July 18, and the ring, designed by the late, legendary rapper, is one of its main attractions. Pac wore the piece of jewelry during his last public appearance in 1996. Pac recurited New York jewelers to help him design the piece, which he wore during the MTV Video Music Awards. Just 10 days later, he was fatally shot in Las Vegas at only 25.

The ring was inspired by Machiavelli and features gold, diamonds, and rubies, and is expected to go for $300,000 once bidding starts.

"Sitting atop a diamond-encrusted gold band is the ‘crown’ itself: a gold circlet studded with the three largest jewels in the entire piece—a central cabochon ruby, flanked by two pavé-cut diamonds,” Sotheby’s wrote about the ring. “Tupac’s selection of the ruby as the principal stone in his crown is a continuation of this royal narrative, as rubies have long been symbolically tied to the imagery of monarchy and wealth in our cultural imagination.”