This percentage is 69,94 %.
38.5
Iron is a mineral. A raw mineral from which iron may be extracted is hematite - as one example.
Hematite is an oxide of iron.
Iron :c)
Hematite, also spelled as hæmatite, is the mineral form of Iron(III) oxide (Fe2O3), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and as corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950°C. Hematite is a mineral, colored black to steel or silver-gray, brown to reddish brown, or red. It is mined as the main ore of iron. Varieties include kidney ore, martite (pseudomorphs after magnetite), iron rose and specularite (specular hematite). While the forms of hematite vary, they all have a rust-red streak. Hematite is harder than pure iron, but much more brittle. Maghemite is a hematite- and magnetite-related oxide mineral.
Hematite and Magnetite are the main ores of Iron.
Iron is a mineral. A raw mineral from which iron may be extracted is hematite - as one example.
Hematite is an ore of iron.
Hematite is a mineral of iron: Fe2O3.
Hematite is an oxide of iron.
Iron :c)
Magnetite belongs to the spinel group of minerals
Hematite is an ore of the element Iron.
Iron. Hematite is the mineral form of iron oxide (Fe2O3).
A ring made of hematite. Hematite is the mineral form of iron and is a dark gray color, sometimes magnetic.
Hematite, also spelled as hæmatite, is the mineral form of Iron(III) oxide (Fe2O3), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and as corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950°C. Hematite is a mineral, colored black to steel or silver-gray, brown to reddish brown, or red. It is mined as the main ore of iron. Varieties include kidney ore, martite (pseudomorphs after magnetite), iron rose and specularite (specular hematite). While the forms of hematite vary, they all have a rust-red streak. Hematite is harder than pure iron, but much more brittle. Maghemite is a hematite- and magnetite-related oxide mineral.
Hematite is a mineral composed largely of iron. Hematite rosary beads would be beads made of hematite used for a rosary.
Hematite is a mineral. This is from wikipedia: A mineral is a naturally occurring solid with a definite chemical composition and a specific crystalline structure. A rock is an aggregate of one or more minerals. Have a look at this page in wiki about hematite: http://en.wikipedia.org/wiki/Haematite