"Green fine-grained variscite relics, rimmed by yellow banded crandallite. Blueish banded wardite on reverse of specimen. Crusts of colourless composite hexagonal micro crystals of carbonate-fluorapatite in cavities. Exchange with Harvard University Mineralogical Museum (C. Frondel), July 21, 1958."
Much of this material was collected in the late 1930s and subsequently sold in gift shops by places such as The Smithsonian and the National Museum in palm-sized slabs, which is the most common way collectors come across it.
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