Artists and scientists solicited to determine their authenticity have debated the paintings for months, The Boston Globe reported.
The paintings went on display Saturday, for the first time since they were discovered in a storage locker five years ago.
Some believe that abstract expressionist Pollock did not create the paintings, because they contain pigments which were unavailable before Pollock’s death in 1956. One of the pictures reportedly contains a red pigment not patented until 1983.
But many Pollock fans who came to the museum believe the paintings are true Pollocks, the Globe reported.
"It's hard to tell," said Caitlin Coyle, 16. "But they look pretty Pollock to me."