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Iron (IVA) Fine Octahedrite
Perhaps the most well-known fossil material in the world
typically associated with granitic pegmatites
These well preserved and larger-sized fossils originate from the Monterey Formation in California
Grape Agate M/L Emerald Iron (IVA) Fine OctahedriteGrape Agate is a unique and distinctive mineral known from only a few locations on earth. Not technically an agate, it is instead formally known as botryoidal purple chalcedony. Named for the small spherical crystal nodules, these individual grapes can range in color from turquoise to deep purple, depending on the presence of minerals like manganese or iron during the formation of the crystals. Grape agate is a relatively new mineral and sought after
