Analysis of information sources in references of the Wikipedia article "Colchis" in English language version.
The tribes in Colchis consolidated during the 13th century BCE. This was at this period mentioned in Greek mythology as Colchis as the destination of the Argonauts and the home of Medea in her domain of sorcery. She was known to Urartians as Qulha (Kolkha or Kilkhi).
they [Colchis] absorbed part of Diaokh (c.750 BCE)
A small percentage of the Colchian Type В hemidrachms are complete with Greek letters. [page 240] The Greek language was widespread in Colchis and decrees were even issued in that language.
They sailed in a long ship to Aea, a city of the Colchians, and to the river Phasis...
Kolchian Aia lies at the furthest limits of sea and earth,