Olivastra Saggianese Olives This page first published: Aug 4, 2004 · Modified: Jun 7, 2018 · by CooksInfo. Copyright © 2020 Olivastra Saggianese are round olives with a high oil yield. The tree can pollinate itself and is a very abundant producer of olives. First grown near Mount Amiata near Seggiano in Grosseto province. Now grown in Tuscany.