The Ruby is the third tier out of 6 available gems.
A player will at least need 13 Rubies to upgrade tools with. Tools have to be upgraded with an Emerald first.
|1 each||Require upgrade with Emerald first|
|variable||Enchanted version gives double stardust|
|variable||The Ruby Key Chest has 4 item slots|
|5||Double the mined marble from Giant Drills|