Rock #6504 While cutting Carver Agate Field geodes this summer, I saw what to me was the perfect citrine plume agate geode. Some explanation: Natural citrine, which is normally a yellow silica (quartz), is quite rare. This is because much of the citrine seen in jewelry today started out as amethyst which was then heat treated to turn it the yellow citrine color. Natural citrine is quite valuable. So if natural citrine is fairly rare, nearly transparent citrine comprising the entire geode is doubly rare. This citrine geode has added rarity—a perfectly formed golden plume agate. It is also of considerable interest that the nearly transparent citrine allows one to see into the citrine surrounding the geode cavity which glows white from the quartz crystals lining the inside of the cavity. In very bright light, other plumes can be seen deeper in the citrine surrounding the cavity. Lastly, while fractures […]

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