"[Augochloropsis Metallica] almost look like jewels, they just sparkle,” says Shalene Jha, a biologist and bee researcher at the University of Texas at Austin, by phone. “I always imagine that they must feel like they’re the most gorgeous creatures on the planet.”
Or maybe its name comes from the fact that the first one was discovered in Lars Ulrich's garage. The internet won't give us a definitive answer.
https://www.sciencefriday.com/