How do expensive coral beads/cabochons fetch so much money? How did they become so smooth and orange when corals are rough, pockmarked, stonelike remains of dead sea creatures? - Quora
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F. Muller-Karger, M. Eakin, L. Guild, C. Hu, M. Vega, R. Nemani, T. Christensen, L. Wood, C. Ravillious, C. Nim, J. Li, C. Fitzgerald, J. Hendee, L. Gramer, - ppt download
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How to carve a lump of fossil coral by hand - Quora
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