Coralium Ore is an ore added by AbyssalCraft. It generates within ocean and swamp biomes, approximately as frequently as iron Ore.
Coralium Ore generates in Oceans and Coralium Infested Swamps at ground level 40 and below, and in Deep Oceans at ground level 20 and below. It will attempt to generate 12 times per chunk, in veins of size 8.
Coralium Ore drops 1-4 Coralium Gems if mined with an Iron Pickaxe or higher. Otherwise, it drops nothing.
Coralium Ore is useless in itself, but the Coralium Gems it drops can be used for a large variety of purposes. One can use them to create Coralium Pearls by crafting Coralium Gem Clusters, combining them with Stone, then smelting or mining the resulting Coralium Infused Stone with a Diamond Pickaxe or higher. They can also be used to craft Chunks of Coralium, which can be smelted down into Refined Coralium Ingots.