The Aeolian island of Lipari. just north of eastern Sicily. was a major geological source of high quality obsidian that was volcanically formed in the Late Mesolithic. followed by another major production in the 1st millennium AD. https://www.roneverhart.com/Apple-Watch-Ultra-2-GPS-Cellular-49mm-Titanium-Case-with-Blue-Black-Trail-Loop-S-M-MRF53LL-A/