Ore

Ore represents the available raw materials needed to create Category: Units

Ore is provided by any planets that are affiliates of your empire. Ore loaned as itself, or as can ships containing ore, to other organizations as part of a trade deal.

Mechanics
An organization may not construct, purchase, or obtain any ships that would lead it to exceed its available ore.

If an organization loses ore or a planet that provided ore and because of this a legally constructed fleet now exceeds the organization's ore limit, the fleet is also still valid, but the organization cannot build anymore units (even if they have a zero ore cost) until the fleet is within the ore limit.

You cannot be gifted or loaned a ship that would exceed your ore limit without also being gifted or loaned the requisite amount of ore.

See also...
See Planetary Resources for a table of planets and how much ore they contain.