The Stardust Pack is an item which is equivalent to 1,000 Stardust. Its primary use is so Stardust can be traded for less than 1 Coin per Stardust on the Player Market. Stardust Packs can be made by clicking on your Stardust in the Status Bar and will show up in the Home Tab. Stardust Packs can be converted back into Stardust by click on them in the Home Tab. There is currently no other way of obtaining Stardust Packs other than Players converting from their own Stardust, so they are essentially useless for Hardcore players.