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Welcome to our extensive antique jewelry glossary with around 1,500 jewelry related entries.If you feel you are missing an explanation, feel free to let us know and we will add it.
A petrified organic substance (or the imprint of a fossilized plant or animal), the organic material having decomposed and been replaced over centuries by an inorganic mineral. Fossilized plants produce bogwood and jet. Fossilized materials are found in fossilized agate, jasper, and opal.
Several varieties of fossilized animal life have been incorporated into articles of jewelry, including opalized snails and mussels, ammonite (shell of snail-like molluscs), turrilite (shell of a spiral-turreted mollusc), and lumachella (shell of triton-like mollusc).
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson