"A device which projects a dense ion field into the air. Any ore that passes through gets a substantial upgrade."
The Ion Field is an Epic-tier shop item released to Miner's Haven on the Summer Update of 2017.
The Ion Field upgrades ore with a multiplier of x2.5 first, then upgrades ores a further 3 times with a multiplier of x1.8, totalling for a multiplier of x14.58. It is also intended for use with an Ore Cannon, but can however also be used along the sides of Raised-ier Conveyors, albeit likely to cause clogging. Another use of these is with Loop-de-Loops, where they can be placed on the straight-up or straight-down portions of the loops, and the ores will pass through them and receive an upgrade from the loop at the same time.