| Domain | Definition | ||
| Mining | 1: A trigonal and hexagonal mineral, (Mg, Fe)2 (Al, Ti)5 O (sub 10); metallic black with imperfect cleavage and conchoidal fracture; with magnetite, ilmenite, corundum, or ferroan spinel in iron ore at Redstand, Norway, and in emery at Whittles, VA. Also spelled hoegbomite. (references) | 2: See: hoegbomite. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
