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CHAPTER 4 AMETRINE QUARTZ Picture #18 Ten-inch-long Amethyst/Citrine (Ametrine) Quartz From the Anahi Mine, Santa Cruz Department, Bolivia Ametrine quartz shows patterns of purple amethyst and orange/gold citrine inside. Chemically, the crystal has manganese atoms and iron atoms interspersed in the silica. Where there is more iron, the crystal takes on a warm gold color. […]

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