As part of the Unified Community Platform project, this wiki and 38 others will be migrated to the new platform in the next few weeks. Minimal changes are expected as part of this migration. Read more here.
Poor Ore is a type of Ore from Railcraft. There are five types of Poor Ore: Iron, Copper, Tin, Lead, and Gold. These Ores were created so that the update containing the Electric Locomotive and all of its related blocks could be created out of Copper, Tin, and Lead. They are unlike normal Ores, as they are smelted into two Nuggets per Ore, rather than a single Ingot. They cannot typically be duplicated.
They have fairly standard spawn mechanics.