Writing? 3000 BC in the Aegean? Not a chance.
It would be interesting if the fragments of writing are similar to those on the Phaistos Disc...
Cycladic culture was a Bronze Age culture found throughout the islands of the Cyclades in the Aegean Sea. In chronological terms, it is a relative dating system for artefacts which broadly complements Helladic chronology and Minoan chronology during the same period of time. Wikipedia
Start date: 3200 BC
End date: 1050 BC