Gold is the fictional substance used to make the One Ring in Tolkien’s legendarium.
Sauron forged the One Ring in the fires of Mount Doom using gold. The Ring was designed to control the other Rings of Power and contained a large part of Sauron’s own power. Its connection to its maker explains why destroying it was necessary to defeat Sauron permanently.
The Ring’s gold is sometimes overlooked because Tolkien emphasizes its inscription, power, and changing appearance rather than identifying it as a named magical metal. It is not made from mithril, the exceptionally valuable metal associated with Moria and other rare objects.
The Ring’s destruction required it to be returned to the volcanic fire of Mount Doom in Mordor. Isildur cut it from Sauron’s hand with the sword Narsil, but kept it rather than destroying it. Bilbo later found it, and Frodo carried it on the quest that forms the central narrative of The Lord of the Rings.