Its first appearance was in Castlevania: Symphony of the Night as a salable ring. It could be sold to the Master Librarian for 3,000 Gold, which is more valuable than a Turquoise (1,500 G) and less valuable than Garnet (5,000 G). Onyx is rarely dropped by the Jewel Sword.
The Onyx in Castlevania: Order of Ecclesia is an item that by itself does nothing. It is needed for Laura's "A Heartwarming Accessory" quest. If the player brings her an Onyx and a Diamond, she will make available the Onyx Ring (greater Dark offensive power), Onyx Pins (greater defense against Dark), Diamond Ring, and Diamond Pins at Jacob's shop.
|Item Data: Onyx|
|Image||Name - Game|
|Type / Users||Attributes / Consume||Statistics / Sell||Found||Notes|
|Valuable Ring|| Other (Jewel/Ring)|
| ATT + 10 (with Jewel Sword - Saturn only)|
| Find: Underground Caverns, Olrox's Quarters|
Create: Jewel Sword
|Agate with a rich, dark color.|| Item|
| Find: Tristis Pass, Training Hall, Large Cavern, Dracula's Castle|
|Increases the power of the dark attribute.|| Accessory (Ring)|
| Attrib: Darkness||Sell: 2,000G|| Buy: 8,000G Find: Wygol Village (Jacob's shop)|
|Ring studded with a black stone|| Accessory (Ring)|
| Attrib: Shadow Affinity +5||Buy: 3 Gold|