Author: Sydney John HicksonPublisher:
ISBN:
Category : Coral jewelry
Languages : en
Pages : 18
Book Description
Precious Corals
Author: Sydney John HicksonPublisher:
ISBN:
Category : Coral jewelry
Languages : en
Pages : 18
Book Description
Precious Corals Fisheries, Western Pacific
Author: Precious Coral and the Legacy of the Coral Road
Author: Iwasaki NozomuPublisher: Cambridge Scholars Publishing
ISBN: 1527571068
Category : Art
Languages : en
Pages : 145
Book Description
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.
Western Pacific Precious Corals, PMP
Author: Guide to the Identification of Precious and Semi-precious Corals
Author: Ernest W. T. CooperPublisher:
ISBN: 9780969373032
Category : Coral jewelry
Languages : en
Pages : 216
Book Description
Precious Coral
Author: Luwei FanPublisher:
ISBN:
Category : Science
Languages : en
Pages :
Book Description
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.
Global Report on the Biology, Fishery and Trade of Precious Corals
Author: Food and Agriculture OrganizationPublisher: Food & Agriculture Org.
ISBN: 9251316988
Category : Nature
Languages : en
Pages : 278
Book Description
This document has been prepared by the Food and Agriculture Organization of the United Nations (FAO), in accordance with a request from CITES (CoP Decision 17.191 on Precious corals, for consideration at the 30th meeting of the Animals Committee). The report concerns precious (red, pink, white and black) coral species within the hexacoral order Antipatharia, and the octocoral family Coralliidae. According to the requirements of CITES Decision 17.191, the study considers all available data and information on the biology, population status, use and trade in each species, including the identification of gaps in such data and information. It contains information on the management and harvest regulation schemes for these coral species, with the aim of considering the effectiveness of their management and conservation. The report intends to inform the CITES parties of the status of the management and trade of precious corals, in order to provide guidance on the actions needed to enhance the conservation and sustainable use of precious corals.
Toward an Ecosystem Approach for the Western Pacific Region: from Species-based Fishery Management Plans to Place-based Fishery Ecosystem Plans
Author: The Commercial Potential of Precious Corals in Micronesia
Author: Richard W. GriggPublisher:
ISBN:
Category : Coral fisheries
Languages : en
Pages : 32
Book Description
Oceanography and Marine Biology
Author: R. N. GibsonPublisher: CRC Press
ISBN: 1439859256
Category : Science
Languages : en
Pages : 578
Book Description
Oceanography and Marine Biology: An Annual Review, Volume 48