CHAPTER 4AMETRINE QUARTZPicture #18Ten-inch-long Amethyst/Citrine (Ametrine) QuartzFrom the Anahi Mine, Santa Cruz Department, BoliviaAmetrine 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.When manganese predominates, the crystal turns out […]
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