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.t 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.
A: One pound is equal to approximately 453.6 grams. Conversely, 1 gram is equal to 0.0022 pounds. The pound is a basic unit of weight in non-scientific instances or mass in scientific circumstances in the imperial system, which is the system primarily used by the United States.
16 ounces is equivalent to one pound. Converting pounds to grams can be done by first converting ounces to pounds, then converting pounds to grams. One pound is equal to approximately 453.59237 grams. The calculation is as follows: 1 ounce * (1 pound / 16 ounces) * (453.59237 grams / 1 pound) = 28.349523125 grams. If such a degree of precision is not required in the conversion, the calculation can be approximated because 1 pound is approximately equal to 454 grams. In this way, 1 ounce * (1 pound / 16 ounces) * (454 grams / 1 pound) = 28.375 grams, which has an error of 0.025476875 grams from the original calculation, or an error of less than 0.09 percent.