, 2009), but this peak was saturated and could not be used to estimate boron concentration. In 2014 alone it yielded the Blue Moon as well as a 122. After exposure to short-wave ultraviolet light, the Blue Moon displayed orange-red phosphorescence for up to 20 seconds. Antique Collectors’ Club Ltd. , 2012; again, see figure 7). Previous studies (Gaillou et al. Go my gia English (US) Tools Services On-Campus Education Professional Development Distance Education Notes & Techniques Gems & Gemology, Winter 10k White Gold Diamond 3d Kite Shape 2014, Vol. The laminations of the tatami patterns are oriented in the 111 planes, the “weak” planes of diamonds corresponding to the octahedral faces. 62 ct rough discovered in January 2014 at the Cullinan mine in South Africa. Diamond and Related Materials, Vol. The tatami pattern was visible in every direction through the diamond. 88 Table center 5. , Kitawaki H.
Time-resolved phosphorescence spectra exhibited peaks at 660 and 500 nm, typical for natural type II blue diamonds. Photo by Tino Hammid, Cora International.
Only a third of the type IIb diamonds examined by Gaillou et al. About the Authors Elo se Gaillou () is associate curator at MINES ParisTech (School of Mines, Paris) and a research associate at the Smithsonian Institution’s National Museum of Natural History in Washington, DC. Right: The Cullinan necklace’s detachable brooch, containing nine blue diamonds (width of brooch = 55. , 2010, 2012; personal communication with Thomas Hainschwang in 2011 on the Indian blue diamond collection of the Natural History Museum in Vienna). Journal of Gemmology, Vol. Philosophical Transactions of the Royal Society 1 Carat Blue Diamond Infinity Cross Religion Pendant Chain 14k Yellow Gold of London A: Mathematical, Physical, and Engineering Sciences. In a recent study that investigated the relationships among color saturation, phosphorescence properties, and concentrations of boron and other impurities in type IIb blue diamonds (Gaillou et al. Photos by Chip Clark, Smithsonian Institution. MATERIALS AND METHODS The Blue Moon diamond has a cushion modified brilliant cut, weighs 12.
983 989, Eaton-Maga a S. References Balfour I. The boron peaks were positioned at 1290, 2456, 2802, 2930, 4090, 5000, and 5365 cm 1. 1928 1931, Great Deal On Invicta j. 4 Study of the Blue Moon Diamond Peer Reviewed Article Elo se Gaillou, Jeffrey E. Phosphorescence data acquired from the Blue Moon diamond. (2000) Colour changes produced in natural brown diamonds by high-pressure, high-temperature treatment.
(1977) On topographically identifiable sources of cathodoluminescence in natural diamonds. 03 ct Fancy Vivid blue, Internally Flawless gem. Jump Aaa 18 14mm Natural Multicolor To: ABSTRACT The Blue Moon diamond, discovered in January 2014 at the historic Cullinan mine in South Africa, is of significance from both trade and scientific perspectives. 52 ct Hope (width = 25. , Woodbridge, Suffolk, UK, 335 pp.
(1982) Colour 1 Carat Blue Diamond Infinity Cross Religion Pendant Chain 14k Yellow Gold centres in diamond. 003 ppm for the 2. Photo by Elo se Gaillou. (1998) Characterization 1 Carat Blue Diamond Infinity Cross Religion Pendant Authentic Burberry Rose Gold Chain 14k Yellow Gold of natural-color type IIb blue diamonds. 62 ct Blue Heart diamond (width = 20. In June 2014, after a few months of examination, the diamond was cut into a 12. Phosphorescence spectra were collected using the portable spectrometer described by Eaton-Maga a et al. A selection of type IIb blue diamonds previously studied. Phosphorescence data from natural type IIb diamonds shows the ratios of initial intensities of the 500 and 660 nm bands plotted against the measured half-lives of the 660 nm emission. An area on the girdle was probed for these spectra. 67 1 Carat Blue Diamond Infinity Cross Religion Pendant Chain 14k Yellow Gold and 317. The Blue Moon did not show any obvious fluorescence (i. The Blue Moon made its first public appearance at the Natural History Museum of Los Angeles County (NHMLAC) on September 13, 2014, for a temporary exhibit running through January 6, 2015. 75 ct type IIa colorless stone, was eventually cut into several stones. 26 ppm is within the average of several notable blue diamonds. Download this issue Learn More About Colored Diamonds Explore colored diamonds history, research, quality factors, and more in the GIA Gem Encyclopedia. After exposure to short-wave ultraviolet light, the Blue Moon displayed orange-red phosphorescence that remained visible for up to 20 seconds. The two largest (545. Compare this with the uncompensated boron averages of 0. Related G&G Articles GIA On Location Field reports, videos, photography, and firsthand accounts from mines and industry hot spots around the world. Liddicoat Gemological Library Search GIAs library catalog of 57,000 books, 1,800 videos, 700 periodicals, and the renowned Cartier Rare Book Repository and Archive. For y-axis values greater than 1, the blue band dominates; for values less than 1, the red band dominates. 329 368, rsta. Pendant Heart With Diamond (1971) The nature of the acceptor centre in semiconducting diamond. (2003) Gem News International: A comparison of three historic blue diamonds. Byrne, and James E. 248 251, 213248a0. 113 1 Carat Blue Diamond Infinity Cross Religion Pendant Chain 14k Yellow Gold 122, (00)00249-1. 03 ct, and measures 15. This observation U Cut Prong Set was surprising, as orange-red phosphorescence is typically associated with diamonds of Indian origin, such as the Hope and the Wittelsbach-Graff. As this value represents only uncompensated boron not charge-compensated by other impurities such as nitrogen the total boron content is at least equal to this measured value, plus potentially some unknown amount of compensated boron. CampdenFB, date accessed: 12 1 2014. , Kiflawi I. 83 86, Fisher D.