Explain the physical properties of chief ores of iron.

The chief ores of iron, primarily hematite (Fe2O3) and magnetite (Fe3O4), possess distinct physical properties that influence their extraction, processing, and utilization in various industrial applications.

1. Color and Streak: Hematite typically exhibits a reddish-brown to silver-gray color, while magnetite is black. When scratched against a rough surface, hematite leaves a reddish-brown streak, whereas magnetite leaves a black streak.

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