Igneous veins are generally formed through hydrothermal (hot water) action. They can occur in any type of igneous rock, although specific ores only appear in specific rock types. Note that this page excludes special types of igneous veins, like serpentine and pegmatite.
| Ore | Rock | Notes |
|---|---|---|
| Cassiterite | Granite | 5% gold, 5% scheelite |
| Chalcopyrite | Granite | 10% gold |
| Chromite | Diorite | 2x ocean, volcanic |
| Cinnabar | Basalt | Only ocean |
| Magnetite | Granite | |
| Stibnite | Granite | |
| Alunite | Andesite, rhyolite | |
| Perlite | Peridotite, diorite, gabbro | Only volcanic |
| Quartz | Granite | |
| Realgar | Granite | Continental |
Granite veins are 25% more frequent in volcanic regions.
