This is a piece of plaster moulding I recovered from the ground in Admiral's Row (Brooklyn, NY) in 2015, prior to its demolition.
I believe this is part of a Corinthian-style plaster moulding consisting of ornamental fluting and floral motifs.
I 3D scanned this at home in AgiSoft PhotoScan using a iPhone 6S, matte drop, and LED lighting.