Gem-quality morganite from Monte Capanne pluton (Elba Island, Italy)

Caucia, Franca; Marinoni, Luigi; Callegari, A.; Leone, Alberto; Scacchetti, Maurizio

doi:10.1127/njma/2015/0293

Cited by 3 publications

(3 citation statements)

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“…We have compared the trace element compositions of beryl from the Shongui berylbearing pegmatites with those of beryl from other pegmatite deposits (unpublished SIMS data of S.G. Skublov and A.K. Gavrilchik and LA-ICP-MS data in [32,78,79]; in total, 49 analyses). According to the concentrations of Li and Cs, the Shongui beryl is comparable to beryl from the Zavitinsky deposit (Figure 7) and differs from it by higher content of Na, Cl, Fe, Cr, Ni, and Co (Figures 8 and 9).…”

Section: Beryl Classificationmentioning

confidence: 99%

“…The cit [79] is correct, after citation [78] Figure 7. Li versus Cs (ppm) plot for beryl from deposits of the world: 1, Shongui deposit, Russia (this study); 2, 6, Elizabeth R, Pala, California, USA; 3, Minas Gerais, Brasilia; 4, Kalba, Eastern Kazakhstan; 5, Madagascar; 7, Shilka region, Transbaikal, Russia; 8, Zavitinskoye deposit, Transbaikal, Russia; 9, Haapaluoma, Finland; 10, Elba, Italy [32]; 11, Tørdal, Norway [78]; 12, Elba, Italy [79]; 13, Shuk-Byul, Sangilen, Tuva, Russia; 14, Kara-Adyr, Sangilen, Tuva, Russia; 2-9, 13-14, data of S.G. Skublov and A.K. Gavrilchik (13, 14, together with Yu.…”

Section: Commented [Va4r3]mentioning

confidence: 99%

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Li-Cs-Na-Rich Beryl from Beryl-Bearing Pegmatite Dike No. 7 of the Shongui Deposit, Kola Province, Russia

Morozova,

Skublov,

Zozulya

et al. 2023

Geosciences

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Beryl is both an accessory and a rock-forming mineral in pegmatites that contain beryl, making it a major source of Be. Beryl-bearing pegmatites of the Shongui deposit, located in the Kola province of the Northeastern Fennoscandian Shield, hold beryl with a yellowish-greenish color. An investigation into the chemical composition of this beryl from pegmatite dike No. 7 has been performed for the first time via the secondary ion mass spectrometry (SIMS) technique, and the chemical composition of the beryl-bearing pegmatites has been analyzed for the first time by the inductively coupled plasma mass spectrometry (ICP-MS) method. These pegmatites have high concentrations (ppm) of Be (11.8), Li (30.9), Rb (482), Nb (50.3), Ta (14.6), Cs (66.8), and Mn (283) and low concentrations of Sr, Y, Ba, rare earth elements (REE), Zr, and Th. In the Shongui pegmatite field, concentrations of Be, Li, Rb, Cs, Nb, Ta, and Mn increase from barren to beryl-bearing pegmatites, whereas concentrations of Ba, Sr, Y, and REE decline. Rb/Ba, Rb/Sr, and Zr/Hf ratios, showing the fractionation degree, change from the barren to beryl-bearing pegmatites: Rb/Ba and Rb/Sr increase from 111 and 0.46 to 1365 and 8.06, respectively, and Zr/Hf decreases from 18.9 to 14.5. The chemical composition of beryl from the Shongui deposit is unique. This mineral has a concentration of 25,300 ppm of alkalis (Li, Cs, K, Rb, Na) and the average Li, Ce, and Na content is 4430, 5000, and 15,400 ppm, respectively. According to its chemical composition, the Shongui beryl belongs to the Li-Cs-Na type, a type that is not recognized in the available classifications. It is supposed that this beryl was mainly crystallized in the magmatic stage rather than in any hydrothermal and metasomatic stages. Two beryl groups have been distinguished in beryl-bearing pegmatite dike No. 7: beryl from the intermediate zone (Brl-I) and beryl from the core zone (Brl-II). These beryls are concluded to have crystallized in the following order: Brl-I and then Brl-II. Compared with Brl-I, Brl-II is depleted in Cs, Na, Cl, and H2O and is enriched in Fe and Mn. The Fe/Mn ratio varies from 9.18 to 16.50 in these beryls and their yellowish-greenish shades are thought to be driven by a large amount of Fe compared to Mn.

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Section: Beryl Classificationmentioning

confidence: 99%

Section: Commented [Va4r3]mentioning

confidence: 99%

Li-Cs-Na-Rich Beryl from Beryl-Bearing Pegmatite Dike No. 7 of the Shongui Deposit, Kola Province, Russia

Morozova,

Skublov,

Zozulya

et al. 2023

Geosciences

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“…Emerald is coloured by Cr or V 7 . When Mn 3+ replaces Al 3+ , morganite is formed 8 . The wide range of iron-containing beryl includes several subspecies such as heliodor, golden beryl 9 , 10 , aquamarine 11 , and Maxixe beryl 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy and chromaticity characterization of yellow to light-blue iron-containing beryl

Shang

Guo

Tang

2022

Sci Rep

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The chemical composition and influencing factors of the colour of 95 yellow to light blue iron-bearing beryl are studied through Electron Microprobe Analysis (EMPA), Energy-dispersive X-ray fluorescence (ED-XRF) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy and X-Rite SP62 spectrophotometer. The intensities of the three characteristic hydroxyl stretching bands of the beryl from 3500 cm−1 to 3800 cm−1 prove they are low to medium levels of alkali bearing natural beryl. The wide absorption edge of 320 ~ 465 nm caused by the ultra-violet charge transfer from O2− to Fe3+ and the 650 nm absorption band in E//c-polarization caused by the intervalence charge transfer between Fe2+ and Fe3+ are the main factors affecting the colour of beryl. By applying CIE D65 standard light source and N9 Munsell neutral background as testing conditions, the colour parameters of 82 gem-quality beryl are tested. According to the results, iron-containing beryl colours are classified into yellow, yellowish-green, bluish-green, greenish-blue, and blue by the K-means cluster analysis method. The blue tone has a greater influence on the hue of beryl, while the yellow tone has a greater influence on the chroma. Iron content is higher in yellow and blue beryl. With the increase of iron content, the lightness of beryl decreased and the chroma increased.

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Kinetic analysis and dosimetric characteristics of the thermoluminescent glow curve of aquamarine (Be3Al2(SiO3)6:Fe)

Cogollo,

Jorge Herrera,

Gutiérrez

2024

Radiation Physics and Chemistry

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Gem-quality morganite from Monte Capanne pluton (Elba Island, Italy)

Cited by 3 publications

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Li-Cs-Na-Rich Beryl from Beryl-Bearing Pegmatite Dike No. 7 of the Shongui Deposit, Kola Province, Russia

Li-Cs-Na-Rich Beryl from Beryl-Bearing Pegmatite Dike No. 7 of the Shongui Deposit, Kola Province, Russia

Spectroscopy and chromaticity characterization of yellow to light-blue iron-containing beryl

Kinetic analysis and dosimetric characteristics of the thermoluminescent glow curve of aquamarine (Be3Al2(SiO3)6:Fe)

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