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Message: <blockquote data-quote="nimaz" data-source="post: 3254820" data-attributes="member: 8965">Osmium or Iridium depending on who you believe.Osmium wins because the specific gravity of Iridium is very slightly lower than Osmium.Density, or volumic mass, is a measure of mass per unit of volume.Specific gravity, now usually called "Relative density" is the number obtained in comparison to water. The higher it is the more dense it is.1 cc (cubic centimetre) of water weighs 1 gram and therefore has a relative density of 1.Osmium is 22.57 but Iridium is only 22.42</blockquote>

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