[Meaning] Magnesian [stone], which attracts iron.
The Pisidian [writes]: "attracting everyone, like the Magnesian stone, or rather what we should call the Heraclean stone: for he has a rather attractive nature."[1]
Some[2] explained the Magnesian stone as Heraclean because Heraclea was in Magnesia. But others [said] that the [stone] which draws in iron is Heraclean, but the Magnesian [stone] is like silver. Thus Euripides in Oineus [writes]: "searching out the minds of men, as the Magnesian stone draws the opinion and changes it back."[3] He is saying that in this case iron is not being drawn by the Magnesian stone, but the opinion of those who observe, which is led astray as by silver.
The Herakleiotes [were] colonists.[4]