How do you authenticate a Joan Miró piece?

To authenticate a Joan Miró piece, look for the artist's signature. Joan Miró hand-signed many of his works in a heavy script. Typically, he added only his last name and placed a period after the ó. Keep in mind that there are many reproductions of his works in circulation. As a result, the best way to authenticate the artist's work is to take your piece to a certified appraiser who can conduct research and thoroughly inspect the work to determine whether it is a genuine Miró. Shop a variety of Joan Miró from some of the world’s top galleries on 1stDibs.