Rare vintage beautiful bust Michelangelo's David sculpture signed A. Giannelli

This is absolutely gorgeous in person; please see the pics as there are a couple areas of wear on both the bust and the base; this is signed by the artist on the back; the artist is Arnoldo Giannelli (1907-2005); the artist is from Italy. This may be marble but I am not sure. Measures 8" x 5" wide. I have this in a grouping of items from the same estate sale; they look amazing together.