Its first appearance was in Castlevania: Symphony of the Night as a "Fairly Valuable Ring". It could be sold to the Master Librarian for 1,500 Gold, which is more valuable than a Aquamarine (800 G) and less valuable than Onyx (3,000 G). Turquoise is rarely dropped by the Jewel Sword.
Turquoise is also second least valuable Jewel in Castlevania: Lament of Innocence (800 Gold), which is twice as much Zircon, but less than an Opal. Using a Turquoise with the Jewel Crush randomly switches the sub-weapon that you have equipped. You do not have an opportunity to change back to the old sub-weapon. This helps "protect travelers" in that it gives a chance that you may get an item you need when you are far from a place where you could get it.
Other Turquoise items
|Item Data: Turquoise|
|Image||Name - Game|
|Type / Users||Attributes / Consume||Statistics / Sell||Found||Notes|
|Fairly Valuable Ring|| Other (Jewel/Ring)|
| ATT + 6 (with Jewel Sword - Saturn only)|
| Find: Forbidden Library, Castle Keep|
Drop: Fire Warg, Paranthropus, Yorick
Create: Jewel Sword
|A blue-green jewel.|| Jewel|
|Sell: $200|| Find: Luminous Cavern (Castle B)|
Rare Drop: Tiny Devil, Man-eater (doublepack)
|A stone said to protect travelers.||Leon Belmont|| Buy: $800 Find: Rinaldo's Shop|
| Effect: With the Jewel Crush, switches the sub-weapon equipped.|