 | | Report (chapter) | | za : ~ -.. ~ " ' " 6 "+,+/ ~ ,"~v..,. k -- '~ ./ II ',..., " Fig. 1. Simplified index...manufacture pottery should be sought within a 1 - 2 k m radius of the production site, whereas a vessel...fragments sometimes associated with plagioclase, K-feldspar, rare muscovite lamellae and small rock fragments...of <200 txm grain size consisting of quartz, K-feldspar, plagioclase, muscovite and/or biotite as major...quartz + plagioclase, quartz + plagioclase + K-feldspar and quartz + muscovite + plagioclase (feldspars |  | | Journal (issue) | | from Zacatecas, Mexico By Emmanuel Fritsch, Peter K. M. Megaw, Tyler L. Spano, Boris Chauviré, Benjamin...Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...hainschwang@ggtl-lab.org) GGTL Laboratories Balzers, Liechtenstein and Geneva, Switzerland 467 What’s New DiaCam360...http://dx.doi.org/10.15506/ jog.1984.19.1.43. Nassau K., 1980. Gems Made by Man. Chilton Book Co., Radnor...one side of the crystal (Figure 3) consisted of K-feldspar and iron sulphide. Ultraviolet-visible–near infrared |  | | Journal (issue) | | GGTL Gemlab–Gemtechlab Laboratory, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...Mineral Society, 15, 91 pp. Milisenda C.C. and Wehr K., 2009. Gemmologie Aktuell: Kornerupine and diopside...Krzemnicki References Henn U. and Schollenbruch K., 2012. Saphirblauer Disthen (Kyanit) aus Nepal. Gemmologie:...34, 62–64. Platonov A.N., Tarashchan A.N., Langer K., Andrut M., Partzsch G. and Matsyuk S.S., 1998. Electronic...Opinio Publishers, Basel, Switzerland. Schmetzer K., Hänni H.A., Bernhardt H.-J. and Schwarz D., 1996 |  | | Journal (issue) | | Thomas Hainschwang GGTL Laboratories, Balzers, Liechtenstein Henry A. Hänni GemExpert, Basel, Switzerland...Pinheiro, M.V.B., GreulichWeber, S. & Krambrock, K. 2005. About the blue and green colours in natural...Star Orthoclase from Québec, Canada Well-formed K-feldspar crystals occur in calcite-rich pods and dykes...cavities (up to 4×3×1.5 m) lined with crystals of K-feldspar, black to dark green pyroxene, green apatite... zircon and other minerals (Joyce 2006). The K-feldspar crystals range from about 2 to 40 cm in largest |  | | Journal (issue) | | patent-pending treatment, he Laboratories, Liechtenstein, gave a presentation on went on to state that...Laboratori s to determ es, owersox ine treatm Liechtenstein, de , presiden ta ents and t of U.S.-b origins...marketing come together, explains Cynthia Unninayar. U K-based Gemfields PLC is bringing big changes producers... c-axis filled by alkali ions (such as Na+, Li+, K+, Rb+, and Cs+), variable amounts of neutral H2O and... D- Emerald in quartz vein and minor potassic feldspar, Dyakou, China, longest crystal: 1.5 cm. Specimen |  | | Journal (issue) | | gemological characterization. The Chinese Red Feldspar Controversy: Chronology of Research Through July...following elements were analyzed: Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, and Fe. We corrected the raw data...nearly pure andradite (≥98 mol.%). Ti, Al, Mn, Na, and K were present in very low amounts (<0.2 wt.%), while...001 2.018 Fe 3+ Mn 0.001 Mg 0.009 Ca 2.991 Na nd K nd 2.964 nd 0.001 2.016 0.001 0.010 2.998 0.008 0...rhodonite (Mn), omphacite (Na), ilmenite (Ti), K-feldspar (K), and pure Cr and V for those elements. Abbreviation: |  | | Journal (issue) | | Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...small melee parcels or ring-mounted samples in the D–K colour range. A scan takes approximately 7–10 seconds...Mineralogical Record, 18(5), 393–411. Wood, D.L. & Nassau, K. 1967. Infrared spectra of foreign molecules in beryl...pp. Ottens, B., Götze, J., Schuster, R., Krenn, K., Hauzenberger, C., Zsolt, B. & Vennemann, T. 2019...which itself contains inclusions of dolomite, feldspar, mica and primary rutile. Photomicrograph by T |  | | Journal (issue) | | Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...Gemology, 38(1), 96–99. Henn U. and Schollenbruch K., 2012. Saphirblauer Disthen (Kyanit) aus Nepal. Gemmologie:...Schollenbruch in darkfield illumination (a,b) and by K. Link in reflected light (c). a Gem Notes b c ...Switzerland References Barley M.E., Pickard A.L., Zaw K., Rak P. and Doyle M.G., 2003. Jurassic to Miocene...29–112. Kan-Nyunt H.-P., Karampelas S., Link K., Thu K., Kiefert L. and Hardy P., 2013. Blue sapphires |  | | Journal (issue) | | collection of the J. Paul Getty Museum L. Thoresen and K. Schmetzer 265 Proceedings of The Gemmological Association...Natural and synthetic vanadium-bearing chrysoberyl K. Schmetzer, M.S. Krzemnicki, T. Hainschwang and H...upon Thames), Prof. George Rossman (Pasadena), Dr K. Schmetzer (Petershausen), Dr Dietmar Schwarz (Bangkok)...Pita, Part I. Revue de Gemmologie, 143, 9–14 Nassau, K., 1983. The Physics and Chemistry of Color: The Fifteen...30(2), 169–83 Mathis, F., Vrielynck, O., Laclavetine, K., Chêne, G., and Strivay, D., 2008. Study of the provenance |  | | Conference Proceedings | | 23rd to 25th October 1952 at the initiative of Prof. K. Schlossmacher and Dr. E. Gübelin. Also present at...Anderson, A. Bonebakker, O. Dragstead, G. Göbel, K. Siess and H. Tillander. At this historic meeting...Israel, India, Italy, Japan, Kenya, Korea, Liechtenstein, Lithuania, Namibia, the Netherlands, Norway...1(2008):83-86 [3] Gaillou, E., Post, J. E., Byrne, K., S., Butler, J. E. "Study of the Blue Moon Diamond...Physical Review B 51.15(1995):9634-9642. [7] Watanabe, K., Lawson, S. C., Isoya, J., Kanda, H., Sato, Y. "Phosphorescence |  | | Journal (issue) | | linear expansion coefficient of lead (~28 × 10−6 mm/K), we calculated that the cast should have contracted...temperature and after immersion in liquid nitrogen (~77 K). We checked for electrical conductivity by putting...with color grade. The spectra were collected at ~77 K and are offset vertically for clarity. FAN = Fancy...a Fancy Deep grayish violet diamond cooled to ~77 K at three excitation wavelengths (488, 514, and 633...for different colors of HGBV diamonds cooled to ~77 K using three excitation wavelengths: (A) 488 nm, (B) |  | | Journal (issue) | | LE TR AN SIT ION LO W 900 km lith Mant osp le k her eel ic d wit iam h ZO ond NE s ER MA NT LE Ma...isotope 238 U U 206 235 207 187 Re 187 40 K Ratio measured 87 143 Sr/86Sr Garnet, clinopyroxene...matrix mineralogy Olivine, carbonate Phlogopite Feldspar Diamond potential Common, can range to high...Photos courtesy of J.W. Harris, S.H. Richardson, and K. Westerlund. A B C D GEMS & GEMOLOGY WINTER 2013... 60 40 20 OL GRT Temperature along geotherm (K) Figure 20. This diagram shows the mineralogy with |  | | Journal (issue) | | Hainschwang, Director, GGTL Laboratories Liechtenstein, Balzers, Liechtenstein; and Masaki Furuya, President, Japan...the assemblage Spr + Fo + Spl +En + Phl ± Po. U-Pb, K-Ar and Rb-Sr radiometric data give a minimum Proterozoic...carbonates (calcite, dolomite, magnesite), phlogopite, K-feldspar, and anhydrite (Table 1). Some of the solids...sulfates) intercalated in carbonate rocks. The Na-K-Ca-Li-CO3-SO4-NO3-Cl-F molten salt assemblages and...syngenetic crystals or corroded protogenetic crystals); feldspar (elongated, colorless crystals; cross- and star-like |  | | Journal (issue) | | R A Howie, D G Kent, R K Mitchell Honorary Fellows: Chen Zhonghui, R A Howie, K Nassau Honorary Life Members:...sapphire occurs in a pegmatite composed of quartz, K-feldspar and muscovite which intrudes schists and marbles...crystals of anhydrite and other salts (of Na-Cl; Ca-Cl; K-C1). In contrast to the sapphires originating from...Pyrrhotite 6 Rutile 6 8 Titanite 7 7 Na, Ca, K-C1 salts 8 8 Spinel 1 1 Tourmaline 2 Zircon...ruby mine C V.6.2 + + Knoan Thong ruby mine A K.1.1 Quy Chau ruby mine A QCRA16a 70 -64.7 A |  | | Journal (issue) | | Fellows: Chen Zhonghui, R.A. Howie, R.T. Liddicoat Jnr, K. Nassau Honorary Life Members: H. Bank, D.J. Callaghan...Engineering Series. Marcel Dekker, New York. Nassau, K, 1983. The physics and chemistry of color. Wiley,...Fancy-color diamonds. Fancoldi Registered Trust, Liechtenstein Hofer, S.C., 1998. Collecting and Classifying...measures 27.1 x 21.0 mm, and weighs 132 ct; collection K. Fischer, Starnberg. Photograph by M. Glas. Figure...from one of these pegmatites which also contains K-feldspar, quartz, muscovite, and schorl (Pezzotta, 2001) |  | | Journal (issue) | | Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...chondrodite samples showed traces of Al, Mn, Ca, Ti, Na and K, consistent with the results presented by Fritz et...magnified 15×. 661 Gem Notes References Schmetzer K., Hänni H.A., Bernhardt H.-J. and Schwarz D., 1996...crystals as seen from their morphological features. In K. Byrappa, T. Ohachi, W. Michaeli, H. Warlimont and...Sample 1.73 g 1.75 g Na2O 0.94–1.0 1.6–2.6 K 2O 0.04–0.13 0.07–0.19 CaO 3.4–3.9 1.0–1.3 MnO |  | | Journal (issue) | | Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...(present as a shoulder; position calculated at 77 K) of unknown attribution. Light reddish purple/purplish...Gemmology, 35(2), 96–118. Zhao, S., Wang, H., Zhou, K. & Xiao, T. 1986. The spin-forbidden absorption spectrum...http://doi.org/10.15506/ jog.1967.10.6.185. Schmetzer, K. & Krupp, H. 1982. Enstatite from Mairimba Hill, Kenya...UV-Vis spectral features of this new Ethiopian feldspar are similar to those of Oregon sunstone. Further |  | | Journal (issue) | | Thomas Hainschwang GGTL Laboratories, Balzers, Liechtenstein Henry A. Hänni GemExpert, Basel, Switzerland...diamonds, ranging from 0.3 ct to 22 mm in diameter, D to K colour and flawless to I3 clarity. A scan is performed...display some unusual surface structures. Photo by K. Schmetzer. b Figure 3: (a) Growth zoning in the...(field of view 4.8 × 4.0 mm). Photomicrographs by K. Schmetzer. THE JOURNAL OF GEMMOLOGY, 38(6), 2023...5 × 15.0 mm perpendicular to the c-axis. Photo by K. Schmetzer. This structure represents the last period |  | | Journal (issue) | | The well-respected names on our masthead are only a K. Myers S. Overlin partial list of the many experts...tourmaline colors produced at this locality. Courtesy of K. Elawar; photo © Harold & Erica Van Pelt. briefly...production of industrial beryl, mica, quartz, feldspar, kaolin clay, and ores of uranium, tantalum, niobium...mining activities. In some areas, much of the feldspar (in both types of pegmatite) has been altered...pegmatites are primarily composed of kaolinized feldspar, along with quartz and micas (muscovite and lepidolite) |  | | Report (issue) | | REPUBLIC LATVIA LEBANON LESOTHO LIBERIA LIBYA LIECHTENSTEIN LITHUANIA LUXEMBOURG MADAGASCAR MALAWI MALAYSIA...participants for their contributions, in particular the late K. Kyser for facilitating and hosting the second research................................................ 93 K. Khoshnoodi, S. Ziapour RADIOMETRIC AND SPECTROANALYTICAL.................... 147 L. Shumlyanskyy, M. Cuney, K. Billström, I. Mikhalchenko, A. Soesoo GEOCHEMICAL...(uranophane, autunite, and gummite) hosted in high K calc-alkaline granites. There are also exposures of |  | | Journal (issue) | | Thomas Hainschwang GGTL Laboratories, Balzers, Liechtenstein Henry A. Hänni GemExpert, Basel, Switzerland...spectroscopy identified as richterite (blue) and feldspar (white). In May 2020, GIT reported on a 7.12 ct...com/591891/188386/UNGC_ and_RJC_Presentation_Slides.pdf. • Justin K Prim (Bangkok, Thailand) explores many facets of the...5 7037–7816 (7480) Mg bdl 8.40–21.61 (9.63) K bdl 364.9–390.1 (375.9) Ca 306.5 198.2–383.0...identified in the present sample, celsian (barium feldspar) is also commonly found in association with charoite |  | | Journal (issue) | | Thomas Hainschwang GGTL Laboratories, Balzers, Liechtenstein Henry A. Hänni GemExpert, Basel, Switzerland...beads, a 43 ct yellow-brown phenakite, azurite in K-feldspar, a 149 ct violet Maxixe-type beryl, ‘caramel...stabilised by the presence of trace components, primarily K+ substituting for Sr2+. Bernstein (1979) also performed...Eu2+ (Tarashchan 1978), and at low temperature (77 K), O–2, VO4, TiO4 and MoO4 (Gaft et al. 1985). The...Thomas Newcomb, London, xii + 135 pp. Schmetzer, K. & Gilg, H.A. 2020. The late 14th-century royal crown |  | | Journal (issue) | | Honorary Fellows: R.A. Howie, R.T. Liddicoat Inr, K. Nassau Honorary Life Members: D.). Callaghan, LA...gemmology. Gems & Gemology, 25(4), 226-31 Nassau, K., 1982. Raman spectroscopy as a gemstone test. J....the elements sodium (Na), calcium (Ca), potassium (K), carbon (C), oxygen (O), silicon (Si), barium (Ba)...and sapphire materials. Colour Type C O AI Na K Ca Cl Orangey-pink 13 X X X X X X X X... s p X X X X X Sample (ct) Colour Type K Na Ca 53.56 orangey-pink 13 X (x) X 37.47 |  | | Journal (issue) | | Thomas Hainschwang, GGTL Laboratories, Balzers, Liechtenstein; Henry A. Hänni, GemExpert, Basel, Switzerland;...the material. EDXRF spectroscopy showed traces of K in these three samples, which may be due to mineral...artificial resin associated with the stabilization, but no K was detected with EDXRF analysis. Although RI readings...Gemology, 47(3), 247–248. Hagos M., Koeberl C., Kabeto K. and Koller F., 2010. Geochemical characteristics...96 210 119 124 Al 19518 18331 17621 16983 K 1106 1212 1162 888 Ti 95 75 23 33 V 5.2 |  | | Report (issue) | | REPUBLIC LATVIA LEBANON LESOTHO LIBERIA LIBYA LIECHTENSTEIN LITHUANIA LUXEMBOURG MADAGASCAR MALAWI MALAYSIA...degrees of partial melting of quartz-rich and feldspar-rich metasedimentary and/or metavolcanic rocks...the European Variscan Belt) but also from (ii) high K calc-alkaline granites (HKCA) (Hotagen, Sweden), when...sedimentary origin) associated with albitization; — HMs-K: K-metasomatic deposits are represented only by the...magmas are indicated (PAk: peralkaline, HKCa: high K calc-alkaline, PAl: peraluminous) [37] (reproduced |
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