I asked this about a replica of the papal crucifix that I have which was blessed by Bl John Paul II, in another thread. Didn’t get an answer though, for that matter.
And since we are on the subject; I have a medal of St Francis which contains soil from his tomb. I also have a splinter of wood from the altar of the chapel in Tuy, Spain, where Lucy had the famous vision of Our Crucified Lord suspended over the altar, with the Father and Spirit above, Our Lady of Fatima to the Right of Our Lord, and the words Graces and Mercy flowing downward from Our Lord’s Body.
HERE.
I received this as a Thank You gift for being the Parish Coordinator for my parish’s Mary 2000 Family Consecration program created in response to the Holy Father’s calling for 3 years of preparation before the new millennium, in which families and households were asked to consecrate themselves to Our Lady of Fatima. The sisters at Tuy, had saved the pieces of wood from the redesign of the original altar post Vatican II. They were given to the International Mary 2000 coordinators in the Philippines. Volunteers broke them into splinters, and each Parish Coordinator received a Holy Card with a picture of the vision and the splinter of wood attached. Truly a wonderful spirituae il treasure. But is it a relic?