Lost Treasures of the Deep

Prompt:  Aseries of mysterious ancient artifacts made from volcanic glass have been found off the coast of Italy—and some believe the objects could represent the cargo of a Neolithic wreck, in what would be a potentially "mind-blowing" discovery, The obsidian artifacts lie on the seabed at a depth of 100 to 130 feet, close to a sea cave on the island's coast known as the Grotta Bianca, or White Grotto, according to the Superintendency of Archaeology,