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.
So, multiply your pound figure by 453.59237 to get your grams figure (or 454 for a rough conversion). How many grams are in an ounce (oz)? There are 28.34952312 grams in an avoirdupois ounce (oz). Therefore, if you want to convert ounces to grams multiply your figure by 28.34952312 (or 28.3 for a rough conversion).