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The coconut pearl is alleged to be a coconut-produced gemstone. Claimed to be the rarest botanical gem in the world, the coconut pearl supposedly grows inside the coconut. However, the existence of these pearls is in dispute, and some claim that published photos are hoaxes.
Wayne's Word, the source of much of the descriptive text and photographs used to illustrate coconut pearls on the Internet, writes that "several botany textbooks flatly state that coconut pearls are a hoax because proof of their existence is totally unfounded" and "I prematurely published an on-line note about this "pearl" [The Maharaja coconut pearl, on display at the Fairchild Tropical Botanic Garden in Coral Gables, Florida] in 1996 before I discovered that it did not come from a coconut." They form in roughly one in every million coconuts according to the Ripley's believe it or not daily calendar.
- Armstrong, Wayne P. (August 1996). "The Coconut Pearl". Coconut Museum. Retrieved 2 October 2010.
- Reginald Child. "Coconuts". 2nd ed. London: Longman Group Ltd. 1974.
- "Botanical Jewelry Necklaces & Bracelets Made From Plants". Wayne's Word: An Online Textbook of Natural History. 2000. Retrieved 16 November 2008.
- "The Coconut Pearl". Wayne's Word. Retrieved 9 December 2010.
- David Fairchild. "Garden Islands of the Great East". Scribner: New York, 1948. pp. 124–5.
- FWT Hunger. "Cocos nucifera". Amsterdam, 1920. pp. 244–50.
- Hunger, F. W. T. (24 January 1925). "Nature and Origin of Coco-Nut Pearls". Nature 115 (2882): 138–9. doi:10.1038/115138a0. Retrieved 2009-01-09.
- "Quick Quiz" Action Comics 155: 34 (April 1951)