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Florida Symbols
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Florida State Stone
Agatized Coral 
Adopted in 1979
Coral is the outside skeleton of tiny ocean animals called polyps, which live in colonies attached to hard underwater surfaces. When alive, polyps combine their own carbon dioxide with the lime in warm seawater to form a limestone-like hard surface, or coral.
Agatized coral occurs when silica in the ocean water hardens, replacing the limy corals with a form of quartz known as chalcedony. This long process (20-30 million years) results in the formation of a "pseudomorph," meaning that one mineral has replaced another without having lost its original form. In 1979 agatized coral was designated the official state stone.
Agatized coral is found in three main Florida locations: Tampa Bay, the Econfina River, and the Withlacoochee/Suwannee river beds.
2000 Florida Statutes, Chapter 15
15.0336 State stone.--Agatized coral, a chalcedony pseudomorph after coral, appearing as limestone geodes lined with botryoidal agate or quartz crystals and drusy quartz fingers, indigenous to Florida, is hereby designated the Florida state stone.
History.--s. 1, ch. 79-278.
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50 State Resource Guide
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Everyone needs a little help, advice, or inspiration now and again. Find state colleges, universities, headline news, newspapers, debt consolidation, financial offerings, radios and TV stations, traffic reports, and state symbols: animals, birds,
flags, flowers, seals, and more as well as quick links to social, demographic, and economic statistics.
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