Minerals range in composition from pure elements and simple salts to very complex silicates with thousands of known forms in general rocks are of three types igneous sedimentary and metamorphic even though rocks do not have a specific physical composition like minerals there is a science of rocks as well called petrology the study of . List of us state minerals rocks stones and gemstones leaders of states in the us which have significant mineral deposits often create a state mineral rock stone or gemstone to promote interest in their natural resources history tourism etc not every state has an official state mineral rock stone and or gemstone however . The mineral and gemstone kingdom is a free informational and educational guide to rocks minerals gemstones and jewelry this site has been providing detailed information and photos of hundreds of mineral and gemstone since 1997 and is one of the leading education resources on minerals and gemstones. Minerals are typically formed when molten rock or magma cools or by separating out of mineral rich water such as that in underground caverns in general mineral particles are small having . Spodumene is an ore of lithium and the mineral of the gems kunzite and hiddenite star garnet star garnets are found in only a few locations worldwide they are the state gems of idaho maw sit sit is a metamorphic rock and a gem material that was once thought be jade geology tools geology tools rock hammers field bags hand lenses
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