The Green Gem is a piece of loot that was removed from Sly Cooper: Thieves in Time. It was going to be found in Feudal Japan, but was ultimately left out for unknown reasons. It was replaced with the Kabuki Mask, as they are both worth 100 coins.
Like its name suggests, it is a green gem, in a classic "brilliant" cut.
|Sly Cooper: Thieves in Time loot|
|*The guards from the Prologue also appear in every other episode in the game, making this loot available in any episode.|