Ruins
Ruins can be found on planets when scanned. If a colony exists you will be able to buy special items from a colony built on that planet.
All of the ruins discovered by players belonged once to great empires of the Ancient Races. Should they have prevailed to the current day, the universe would be a much different place, and the Terrans may have never lasted long enough to take to the stars. Unfortunately, they were destroyed by an UrQa invasion fleet shortly after the first Paxian visit to our universe. This first UrQa occupation was eventually routed and their fleets destroyed, but it was too late for the Mzungu, Bule, Vazaha and Faranji. Much of this lore is revealed within the Enigma and Ancient Ruin mission lines.
Quote from HAL:
"The colony will only extract one ruin from the planet at a time, so stop buying the other ruin that you have and after a while you will get the chance to extract again. The colony will also store ruins up to the storage limit so you will need to wait for it to continue extracting and stockpiling the ruin that you don't want. That could take a couple of days.
Long story short - don't extract anything but the item you want and you will get it. There is no limit on the number of any given item that you can extract."
Ruin Types