Drawing on diverse perspectives, this collection of 12 essays and around 150 colour illustrations explores the history and mysteries of the “Coral Road” from the Mediterranean to Japan. From Italy, with its ancient traditions of deep-sea coral fishery, production and trade, the reader is transported to Tibet and India, where coral has long been revered as a Buddhist treasure and amulet. The focus then moves to Japan, with the book highlighting the vivid red coral “tree” of folklore and festivals and the lavish use of the exotic gemstone in the magnificent accessories and craftwork of the Edo Period (1603–1868), before tracing the history of Japanese coral fishery, trade and production in modern times. Inspired by an urgently perceived need to preserve the legacy of precious coral for future generations, this retrospective, yet forward-looking, book will appeal to a wide readership, from marine ecologists to economic, social, cultural and religious historians, as well as scholars of fashion and design.

A literary and cultural history of coral—as an essential element of the marine ecosystem, a personal ornament, a global commodity, and a powerful political metaphor Today, coral and the human-caused threats to coral reef ecosystems symbolize our ongoing planetary crisis. In the nineteenth century, coral represented something else; as a recurring motif in American literature and culture, it shaped popular ideas about human society and politics. In Coral Lives, Michele Currie Navakas tells the story of coral as an essential element of the marine ecosystem, a cherished personal ornament, a global commodity, and a powerful political metaphor. Drawing on a wide range of sources, including works by such writers as Sarah Josepha Hale, Harriet Beecher Stowe, Frances Ellen Watkins Harper, and George Washington Cable, Navakas shows how coral once helped Americans to recognize both the potential and the limits of interdependence—to imagine that their society could grow, like a coral reef, by sustaining rather than displacing others. Navakas shows how coral became deeply entwined with the histories of slavery, wage labor, and women’s reproductive and domestic work. If coral seemed to some nineteenth-century American writers to be a metaphor for a truly just collective society, it also showed them, by analogy, that society can seem most robust precisely when it is in fact most unfree for the laborers sustaining it. Navakas’s trailblazing cultural history reveals that coral has long been conceptually indispensable to humans, and its loss is more than biological. Without it, we lose some of our most complex political imaginings, recognitions, reckonings, and longings.

Precious coral, with attractive pink-to-red colour, has been used for ornamental purposes for several thousand years. According to the related science, attractive red precious corals material, are defined to the class Anthozoa, subclass Octocorallia, order Alcyonacea, suborder Scleraxonia, and family Coralliidae in zootaxy. About 30 species are discovered in Coralliidae family compared to the huge Cnidaria phylum. Corallium rubrum, Corallium japonicum, and Corallium elatius are the three main species in Coralliidae family used for jewelry material in the gem market. The purpose of this chapter is to show the nature of animals in Coralliidae family, analyze the nondestructive test methods to identify the natural species from the imitations, and discuss the origin of colour and the interactions in between the organic matrix and mineral. The chapter was organized in six parts. The first part reviews the history of precious coral used for different purposes by humans and then describes exact affiliation of precious coral on zoology and taxonomy. The second part deals with the biology and formation of precious coral. The paragraph also presents the information about Coralliidae colonies' sexual maturity, life span, growth rate, and mortality. The trade market and conservation are also summarized in this part. The gemological properties of C. rubrum, C. japonicum, and C. elatius, the main species in precious coral market, are introduced in the third part. As a consequence, an effective and nondestructive identification method to distinguish natural precious corals from their imitations was stated with Raman spectra as demonstrated in the fourth part. In the fifth part, the origin of precious coral colour based on the results of Raman scattering measurements and PeakFit analysis is demonstrated. Three different excitation wavelengths (785, 633, and 514 nm) were used for the same samples at the same points. The result shows that all of the samples are coloured by a mixture of pigments. Different colours are explained by different mixtures, not by a single pigment. Organic composition, even present in a small amount, plays an important role in the colour of precious corals. The sixth part concludes the text by presenting what we have learned from the experimental data of microscope, SEM, TEM, and EBSD. The spatial relationship between the organic matrix and mineral components is determined by SEM observation on decalcification-treated samples. By integration of the results from nanometer to centimeter-scale detections, a hierarchical structure of precious coral is revealed. In the skeleton of precious coral, building blocks are arranged into several hierarchical levels of oriented modules. The modules in each hierarchical level assemble into larger unit that comprises the next higher level of the hierarchy. Precious coral, as a member of biomineral family, assembled skeleton as a delicate arrangement of a hierarchy of crystals with well-defined orientations under the control of organic matrix. Organic matrix works in both colour pigment and architecture field for the precious coral.

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