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Antigua Twenty Thousand Leagues Under The Sea Mickey Donald Sov
Mozambique First International Polar Year Karl Weyprecht Mini Sov
Mushrooms Russula Paludosa Mini Sov
and Alfred Sisley
Minerals Titanite Amethyst Quartz Mini Sov. Sheet MNH Malawi Dogs Souvenir Sheet of 6 stamps Antigua Twenty Thousand Leagues UnderMinerals Titanite Amethyst Quartz Mini Sov. Sheet MNH A mineral is a naturally occurring chemical compound, usually of crystalline form and not produced by life processes. A mineral has one specific chemical composition, whereas a rock can be an aggregate of different minerals or mineraloids. The study of minerals is called mineralogy. As of March 2018, there are more than 5,500 known mineral species; 5,312 of these have been approved by the
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