What are the chemical symbols of chromite and iron ore?

Chemical Formula: FeCr2O4, Iron Chromium Oxide. for Chromite Chemical Formula: Fe3O4, Iron Oxide for magnetite However Iron is a transition metal and combines with alot of other elements to form ores, sulphur, magnesium etc. heres a list but it is not exhaustive. ILMENITE (Iron Titanium Oxide) (Score=1000, Size=13934) BORNITE (Copper Iron Sulfide) (Score=984, Size=5737) PENTLANDITE (Iron Nickel Sulfide) (Score=980, Size=7231) HEMATITE (Iron Oxide) (Score=976, Size=4366) Mineral Gallery - Franklin, New Jersey (Score=975, Size=11507) SPHALERITE (Zinc Iron Sulfide) (Score=973, Size=8535) ARSENOPYRITE (Iron Arsenide Sulfide) (Score=971, Size=3878) CHROMITE (Iron Chromium Oxide) (Score=965, Size=5024) MELANTERITE (Hydrated Iron Sulfate) (Score=963, Size=6481) Mineral Gallery - THE ARIZONA COPPER MINES (Score=962, Size=26435) LIMONITE (Hydrated Iron Oxide) (Score=958, Size=3101) FORSTERITE (Magnesium Iron Silicate) (Score=957, Size=9785) OLIVINE (Magnesium Iron Silicate) (Score=957, Size=10270) COLUMBITE (Iron Manganese Magnesium Niobium Tantalum Oxide) (Score=956, Size=6253) TANTALITE (Iron Manganese Tantalum Niobium Oxide) (Score=956, Size=6407) Mineral Gallery - The Spinel Group (Score=956, Size=6640) COPIAPITE (Hydrated Iron Magnesium Sulfate Hydroxide) (Score=955, Size=5805) BIXBYITE (Manganese Iron Oxide) (Score=955, Size=4951) FRANKLINITE (Zinc Iron Manganese Oxide) (Score=954, Size=3681) CHALCOPYRITE (Copper Iron Sulfide) (Score=954, Size=4490) COBALTITE (Cobalt Iron Arsenic Sulfide) (Score=954, Size=5343) CUBANITE (Copper Iron Sulfide) (Score=954, Size=4129) SCORODITE (Hydrated Iron Arsenate) (Score=953, Size=3901) SIDERITE (Iron Carbonate) (Score=953, Size=8560) PYRITE (Iron Sulfide) (Score=951, Size=6651) ANKERITE (Calcium Iron Magnesium Manganese Carbonate) (Score=948, Size=6490) PARAVAUXITE (Hydrated Iron Aluminum Phosphate Hydroxide) (Score=948, Size=6854) VAUXITE (Hydrated Iron Aluminum Phosphate Hydroxide) (Score=948, Size=4572) TENNANTITE (Copper Arsenic Sulfide) (Score=948, Size=5295) TETRAHEDRITE (Copper Antimony Sulfide) (Score=948, Size=4979) Lollingite (Iron Arsenide) (Score=947, Size=6823) BEUDANTITE (Lead Iron Arsenate Sulfate Hydroxide) (Score=946, Size=7619) FERBERITE (Iron Tungstate) (Score=946, Size=4049) PYRRHOTITE (Iron Sulfide) (Score=946, Size=4342) GOETHITE (Hydrated Iron Oxide) (Score=945, Size=3236) CHILDRENITE (Hydrated Iron Manganese Aluminum Phosphate Hydroxide) (Score=945, Size=4595) PHARMACOSIDERITE (Hydrated Potassium Iron Arsenate Hydroxide) (Score=945, Size=5768) WOLFRAMITE (Iron Manganese Tungstate) (Score=945, Size=3679) MAGNETITE (Iron Oxide) (Score=944, Size=3829)

FeCr2O4

CM and Fe iron is iron

Chromite is a mineral, with the formula Fe2+Cr2O4 (the 2+ is superscript, while the next 2 and 4 are sub-scripts) or Fe++Cr2O4. Iron Ore is rich in Iron Oxides (like Magnetite - Fe3O4, and Hematite - Fe2O3).

Fe for iron as you can see it from the element table in chemistry and Cr for chromium but not very sure what you mean for chromite never heard in all the years i have been studying chemistry.