Which of these minerals would most likely be valued as a gem and used in jewelry?
olivine, a green or gray mineral with a hardness rating of 6.5
gypsum, a pink or white mineral with a hardness rating of 2
galena, a metallic silver mineral with a hardness rating of 2.5
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Which of these minerals would most likely be valued as a gem and used in jewelry?
olivine, a green...
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