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Template:POTD/2011-12-30

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Iron chips and cube
Pure (99.97+%) iron chips, electrolytically refined, as well as a high purity 1 cm3 iron cube for comparison. Iron is the most common element (by mass) on Earth, forming much of the outer and inner core, as well as the fourth most common element in the Earth's crust.Photo: Alchemist-hp