 | | Journal (article/letter/editorial) | | Dezember 2001 The origin of colour of chrysoprase from Szklary (Poland) and Sarykul Boldy (Kazakhstan) Micha...M. (2001): The origin of colour of chrysoprase from Szklary (Poland) and Sarykul Boldy (Kazakhstan). –...Abstract: Samples of chrysoprase from the chrysoprase “type” locality in Szklary, Poland and from Sarykul...colour. The allochromatic “apple-green” colour of chrysoprase results from nanometer-size inclusions of aggregates...phyllosilicates and protophyllosilicates, mainly Ni – kerolite and minor pimelite, that occur predominantly draped |  | | Journal (article/letter/editorial) | | New data on “kerolite–pimelite” series and the colouring agent of Szklary chrysoprase, Poland Zdeňka Čermáková1...Abstract Green clay and chrysoprase samples from the Ni-laterite deposit in Szklary, Poland, were studied by...spectroscopies. The clay samples proved to be Ni-rich “kerolite” and “pimelite”, and as these minerals are currently...mass spectrometry. These methods showed that “kerolite” and “pimelite” contain interlayer water, i.e...Subsequently, the XRD and EMPA analyses of Szklary chrysoprase indicated that chrysoprase’s colouring agent |  | El Mendili, Yassine, Orberger, Beate, Chateigner, Daniel, Bardeau, Jean-François, Gascoin, Stéphanie, Petit, Sébastien, Perez, Olivier (2022) Occurrence of SiC and Diamond Polytypes, Chromite and Uranophane in Breccia from Nickel Laterites (New Caledonia): Combined Analyses. Minerals, 12 (2) 196 doi:10.3390/min12020196 | Journal (article/letter/editorial) | | core of nickel laterites in New Caledonia (Tiebaghi mine). XRD analyses show quartz as a major phase. Micro-Raman...attributed to ultrahigh-pressure crystallization in the lower mantle. The SiC and diamond polytypes are inherited...attributed to a three-stage process: formation in the lower mantle, transport into the upper mantle peridotite...laterite profile, located in saprolite, at the Tiebaghi mine, New Caledonia. The silica rich rocks (sample ER-NC00-0001)...performed in the nickel laterite profile at the Tiébaghi Mine in the northwestern part of New Caledonia. 2.2. |  | Jiang, Yuansheng, Guo, Ying, Zhou, Yufei, Li, Xiang, Liu, Simin (2021) The Effects of Munsell Neutral Grey Backgrounds on the Colour of Chrysoprase and the Application of AP Clustering to Chrysoprase Colour Grading. Minerals, 11 (10) 1092 doi:10.3390/min11101092 | Journal (article/letter/editorial) | | Backgrounds on the Colour of Chrysoprase and the Application of AP Clustering to Chrysoprase Colour Grading Yuansheng...Munsell Neutral Grey Backgrounds on the Colour of Chrysoprase and the School of Gemmology, China University...Correspondence: guoying@cugb.edu.cn Abstract: Chrysoprase is a popular gemstone with consumers because...effective background of the Munsell Chart for chrysoprase colour grading under a 6504K fluorescent lamp...coloured gems for the first time. Forty gem-quality chrysoprase samples from Australia were studied using a UV-VIS |  | | Journal (issue) | | gemological study of blue sapphires from the Baw Mar mine (Mogok, Myanmar)’ was posted by the Gemological...apphires-baw-mar-minemogok-myanmar. The Baw Mar mine has recently produced a significant amount of fine...blue colour of stones from the northern part of the mine is medium to dark, while material from the southern...from the now-inactive Sleeping Beauty turquoise mine. The appearance of the material varies from uniformly...atomic number (with darker areas corresponding to lower values, and vice versa), and the X-ray map on the |
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