New developments in cultured pearl production: use of organic and baroque shell nuclei
نویسندگان
چکیده
Cultured pearls can be produced both with and without a nucleus. Marine pearl oysters that produce Akoya, South Sea and Tahitian cultured pearls typically use nuclei for their pearl products. The nucleus material used for these beaded cultured pearls is traditionally from freshwater Mississippi mussels. In recent years, there have been a number of attempts to use alternative pearl and shell materials as nuclei. This includes different types of shells, Bironite, laminated/powdered shell, freshwater cultured pearls and even natural pearls. The most recent development, detailed in this article, is the use of organic nuclei for the production of 2nd generation beaded baroque cultured pearls. Pearls cultured in this way first appeared on the market at the 2012 BaselWorld show. This paper examines how these pearls are linked to this new type of nucleus, how it is used in the pearl farming process, and details a gemmological study of the different generations of final pearl products.
منابع مشابه
Assessment of Toxic Metals Concentration using Pearl Oyster, Pinctada radiate, as Bioindicator on the Coast of Persian Gulf, Iran
Background: Persian Gulf is a semi-closed environment which is affected by pollution from heavy metals. Entrance of heavy metals to the water column and binding to sediment particles can affect the benthic organisms that can accumulate these materials in their body. Noticing this ability, mussels are considered as bio-monitoring agents. Methods: The pearl oyster, Pinctada radiate, and sed...
متن کاملInfluence of water temperature and food on the last stages of cultured pearl mineralization from the black-lip pearl oyster Pinctada margaritifera
Environmental parameters, such as food level and water temperature, have been shown to be major factors influencing pearl oyster shell growth and molecular mechanisms involved in this biomineralization process. The present study investigates the effect of food level (i.e., microalgal concentration) and water temperature, in laboratory controlled conditions, on the last stages of pearl mineraliz...
متن کاملThe effects of exposure to near-future levels of ocean acidification on shell characteristics of Pinctada fucata (Bivalvia: Pteriidae)
Atmospheric carbon dioxide concentrations have greatly increased since the beginning of the industrial age. This has led to a decline in global ocean pH by 0.1 units, and continued decline of 0.3–0.5 units is predicted by the end of 2100. Acidification of the ocean has led to decreased calcification rates and dissolution of calcareous structures in a range of marine species. Shells of the pearl...
متن کاملPolyolefin and olefin production in Iran: Current and future capacities
Due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in various industries is becoming a major priority. The Middle East region, on account of its vast oil and gas reserves has, in the last decade or so, been developing many new petrochemical complexes with their expansion into colossal polyolefin production capacities. The predictions are th...
متن کاملA preliminary study for identification of candidate AFLP markers under artificial selection for shell color in pearl oyster Pinctada fucata.
Pearl oyster Pinctada fucata is widely cultured to produce seawater pearl in South China, and the quality of pearl is significantly affected by its shell color. Thus the Pearl Oyster Selective Breeding Program (POSBP) was carried out for the shell color and growth traits. The black (B), gold (G), red (R) and white (W) shell strains with fast growth trait were achieved after five successive gene...
متن کامل