Gusaba: Flat ring high gradient magnetic itandukanya ikoreshwa cyane muri hematite itose, limonite, siderite, chromite, ilmenite, wolframite, tantalum na niobium nubutare bwamabuye y'agaciro ya magnetique, hamwe namabuye y'agaciro adafite ubutare, nka quartz, feldspar mugukuraho ibyuma byanduye no kwezwa. .