Using the Ruby with the Jewel Crush causes damage to all enemies on the screen.
The Ruby in Castlevania: Order of Ecclesia is an item that by itself does nothing. It is needed for Laura (Order of Ecclesia)'s "A Pleasant Accessory" quest. If you bring Laura a Ruby, an Emerald, and a Sapphire, she will make available the Ruby Ring (greater Fire offensive power), Ruby Pins (greater defense against Fire), and the rings and pins of the other Jewels brought to her at Jacob's shop.
Other Ruby items
The Ruby Circlet in Symphony of the Night gives the player HP whenever you they hit with a Fire based attack. The Bloody Stud gives more intelligence than any other stud in Dawn of Sorrow. The Ruby Corset is the only corset in Portrait of Ruin that also gives an Strength boost in addition to a Defense boost.
|Item Data: Ruby|
|Image||Name - Game|
|Type / Users||Attributes / Consume||Statistics / Sell||Found||Notes|
|A valubale red jewel.|| Jewel|
|Sell: $600|| Rare Drop: Skeleton Glass|
|A sparkling, red-colored jewel.||Leon Belmont|| Buy: $3,000 Find: Rinaldo's Shop|
Drop: Armor Knight
| Effect: With the Jewel Crush, causes damage all enemies on the screen.|
|A highly-valuable, deep red gemstone.|| Item|
| Find: Tymeo Mountains, Tristis Pass, Argila Swamp, Dracula's Castle|
|Increases the power of the flame attribute.|| Accessory (Ring)|
| Attrib: Flame||Sell: 2,000G|| Buy: 8,000G Find: Wygol Village (Jacob's shop)|