I am playing through legend of dragoon (for the playstation 1) and forgot how many stardust there are in the game. Additionally, would someone be able to provide the rewards for each amount of stardust collected? I think that there are around 50, and the collection of all of them unlocks a secret boss, but I am not too sure.
There are 50 stardust in the game. For every 10 that you collect, you can visit Martel to gain a new accessory.
This article in the Legend of Dragoon wiki provides more information on Stardust, as well as a guide on where to find all 50.