Onyx Ore

Onyx Ore is a valuable ore found rarely in the Nether.When mined, an onyx gem is obtained. It can be used to craft glowing obsidian, which is used to create the mystic portal.

Trivia

 * Onyx ore is 24x as rare as netherquartz ore, making it the rarest ore in the game.
 * Onyx ore spawns in veins of 1 to 4.
 * Used to be used for tools until netherite was added.