Ilmenite is an unremarkable stone that can be found in small quantities within gabbro. Though it is magma-safe, gabbro itself is also magma-safe.
In the real world, ilmenite is often mined for production of titanium dioxide, a common white pigment. It can also be used as a source of iron (which is the case in the Civilization Forge mod).
a major titanium ore but can't refine through smelting (see e.g. Kroll process)
[SOLID_DENSITY:4720] Previous value was much too low.