A naturally mined iron titanium oxide mineral. It is generally black as sand, odorless, tasteless, opaque under a microscope, non-flammable and insoluble at 20°C. Granular Ilmenite is primarily used as an addition to clay or glaze to introduce dark brown, peppery specks. Granular Ilmenite is primarily used as an addition to clay or glaze to introduce dark brown, peppery specks.