Works matching DE "AMETHYSTS"

Results: 52

Circular Dichroism Spectra of Synthetic Amethyst Crystals.

Published in:

Crystallography Reports, 2005, v. 50, n. 3, p. 461, doi. 10.1134/1.1927610

By:

Burkov, V. I.;
Egorysheva, A. V.;
Kargin, Yu. F.;
Mar’in, A. A.;
Fedotov, E. V.

Publication type:

Article

Amethyst Occurrences in Tertiary Volcanic Rocks of Greece: Mineralogical, Fluid Inclusion and Oxygen Isotope Constraints on Their Genesis.

Published in:

Minerals (2075-163X), 2018, v. 8, n. 8, p. 324, doi. 10.3390/min8080324

By:

Voudouris, Panagiotis;
Melfos, Vasilios;
Mavrogonatos, Constantinos;
Tarantola, Alexandre;
Götze, Jens;
Alfieris, Dimitrios;
Maneta, Victoria;
Psimis, Ioannis

Publication type:

Article

Moroccan amethyst: Mining and marketing.

Published in:

Gems & Gemology, 2017, v. 53, n. 1, p. 126

By:

Lucas, Andrew;
Tao Hsu

Publication type:

Article

Ametrine Optical Dishes: Windows into the Effects of Crystal Structure.

Published in:

Gems & Gemology, 2017, v. 53, n. 1, p. 102

By:

Skalwold, Elise A.;
Bassett, William A.

Publication type:

Article

AMETHYST FROM BOUDI, MOROCCO.

Published in:

Gems & Gemology, 2015, v. 51, n. 1, p. 32, doi. 10.5741/gems.51.32

By:

Troilo, Fabrizio;
El Harfi, Abdelghani;
Mouaddib, Salahaddine;
Bittarello, Erica;
Costa, Emanuele

Publication type:

Article

Colored Gems, Chinese Jewelry Designers, and Colored Diamond Spectra.

Published in:

Gems & Gemology, 2015, v. 51, n. 1, p. 1

By:

Pay, Duncan

Publication type:

Article

Infrared Spectroscopy of Natural vs. Synthetic Amethyst: An Update.

Published in:

Gems & Gemology, 2011, v. 47, n. 3, p. 196, doi. 10.5741/GEMS.47.3.196

By:

Karampelas, Stefanos;
Fritsch, Emmanuel;
Zorba, Triantafillia;
Paraskevopoulos, Konstantinos M.

Publication type:

Article

Gem-quality amethyst from Tata, Morocco.

Published in:

Gems & Gemology, 2009, v. 45, n. 1, p. 62

By:

Beaton, Donna

Publication type:

Article

Amethyst from the Democratic Republic of the Congo.

Published in:

Gems & Gemology, 2007, v. 43, n. 1, p. 64

By:

Fritz, Eric A.;
B. M. L.

Publication type:

Article

Treated violetish blue to violet quartz from Brazil.

Published in:

Gems & Gemology, 2006, v. 42, n. 4, p. 285

By:

Güttler, Rainer Schultz;
Kohigashi, Hisahiro Claudio

Publication type:

Article

A Refined Infrared-Based Criterion for Successfully Separating Natural from Synthetic Amethyst.

Published in:

Gems & Gemology, 2006, v. 42, n. 3, p. 155

By:

Karampelas, Stefanos;
Fritsch, Emmanuel;
Zorba, Triantafyllia;
Paraskevopoulos, Konstantinos M.;
Sklavounos, Spyros

Publication type:

Article

Preliminary Observations of a New Polishing Process for Colored Gems.

Published in:

Gems & Gemology, 2006, v. 42, n. 3, p. 139

By:

Richardson, Peter;
Stour, Tom;
McGee-Boehm, Carley;
Larson, William;
Boehm, Edward

Publication type:

Article

Amethyst Mining in Zambia.

Published in:

Gems & Gemology, 2006, v. 42, n. 3, p. 112

By:

Anckar, Bjorn

Publication type:

Article

Amethyst and citrine from northwestern Namibia.

Published in:

Gems & Gemology, 2005, v. 41, n. 1, p. 54

By:

B. M. L.

Publication type:

Article

Amethyst from Georgia.

Published in:

Gems & Gemology, 2005, v. 41, n. 1, p. 53

By:

B. M. L.

Publication type:

Article

Vintage Violets.

Published in:

African Violet Magazine, 2012, v. 65, n. 5, p. 46

By:

Elkin, Barbara;
McKenna, Sam

Publication type:

Article

What Oxidation State of Iron Determines the Amethyst Colour?

Published in:

Hyperfine Interactions, 2004, v. 156/157, n. 1-4, p. 417, doi. 10.1023/B:HYPE.0000043262.10503.8a

By:

Dedushenko, S. K.;
Makhina, I. B.;
Mar'In, A. A.;
Mukhanov, V. A.;
Perfiliev, Yu. D.

Publication type:

Article

Amethyst leaf extract as pest control and fertilizer for soybean plants.

Published in:

Biodiversitas: Journal of Biological Diversity, 2022, v. 23, n. 7, p. 3355, doi. 10.13057/biodiv/d230706

By:

RUMAPE, OPIR;
LA KILO, AKRAM;
INO ISCHAK, NETTY

Publication type:

Article

Distinguishing natural from synthetic amethyst: the presence and shape of the 3595 cm<sup>−1</sup> peak.

Published in:

Mineralogy & Petrology, 2005, v. 85, n. 1/2, p. 45, doi. 10.1007/s00710-005-0101-9

By:

Karampelas, S.;
Fritsch, E.;
Zorba, T.;
Paraskevopoulos, K. M.;
Sklavounos, S.

Publication type:

Article

Mineral Mysteries: The Jacksons Crossroads Enigma, Wilkes County, Georgia.

Published in:

Rocks & Minerals, 2013, v. 88, n. 5, p. 476, doi. 10.1080/00357529.2013.809997

By:

White, JohnS.

Publication type:

Article

Collector's Note: Quartz Scepters from Crystal Park, Beaverhead County, Montana.

Published in:

Rocks & Minerals, 2012, v. 87, n. 5, p. 459, doi. 10.1080/00357529.2012.678669

By:

Landon, Jim

Publication type:

Article

Amethyst Scepters from the Santo Nino Mine, Santa Cruz County, Arizona.

Published in:

Rocks & Minerals, 2012, v. 87, n. 2, p. 126, doi. 10.1080/00357529.2012.639670

By:

Muntyan, BarbaraL.

Publication type:

Article

Let's Get It Right: Lepidocrocite—It Just Won't Go Away!

Published in:

Rocks & Minerals, 2010, v. 85, n. 3, p. 275, doi. 10.1080/00357521003727249

By:

White, JohnS.

Publication type:

Article

Gemstone Deposits in Turkey.

Published in:

Rocks & Minerals, 2010, v. 85, n. 2, p. 124, doi. 10.1080/10511970903455868

By:

Hatipoglu, Murat;
Babalik, Hakki;
Chamberlain, StevenC.

Publication type:

Article

Spectacular Amethyst: From the Diamond Hill Quartz Prospect Abbeville County, South Carolina.

Published in:

Rocks & Minerals, 2009, v. 84, n. 1, p. 66, doi. 10.3200/RMIN.84.1.66-68

By:

Jacquot, Richard;
Karwoski, Chester

Publication type:

Article

The Treasure Chest Pockets: An Update on the Jacksons Crossroads Amethyst Mine Wilkes County, Georgia.

Published in:

Rocks & Minerals, 2008, v. 83, n. 6, p. 550, doi. 10.3200/RMIN.83.6.550-552

By:

Geffner, Paul

Publication type:

Article

Scovil Unpublished Favorites: 2007.

Published in:

Rocks & Minerals, 2008, v. 83, n. 2, p. 134, doi. 10.3200/RMIN.83.2.134-139

By:

Scovil, Jeffrey A.

Publication type:

Article

Collecting Update.

Published in:: Rocks & Minerals, 2006, v. 81, n. 6, p. 455
Publication type:: Article

SPECIMEN ACQUISITIONS.

Published in:: Rocks & Minerals, 2000, v. 75, n. 5, p. 360
Publication type:: Article

Mineralisation of amethyst-bearing geodes in Ametista do Sul (Brazil) from low-temperature sedimentary brines: evidence from monophase liquid inclusions and stable isotopes.

Published in:

Mineralium Deposita, 2014, v. 49, n. 7, p. 861, doi. 10.1007/s00126-014-0522-7

By:

Gilg, H.;
Krüger, Yves;
Taubald, Heinrich;
Kerkhof, Alfons;
Frenz, Martin;
Morteani, Giulio

Publication type:

Article

Stable isotope and mineralogical investigation of the genesis of amethyst geodes in the Los Catalanes gemological district, Uruguay, southernmost Paraná volcanic province.

Published in:

Mineralium Deposita, 2011, v. 46, n. 3, p. 239, doi. 10.1007/s00126-010-0323-6

By:

Duarte, Lauren C.;
Hartmann, Leo A.;
Ronchi, Luiz H.;
Berner, Zsolt;
Theye, Thomas;
Massonne, Hans J.

Publication type:

Article

The genesis of the amethyst geodes at Artigas (Uruguay) and the paleohydrology of the Guaraní aquifer: structural, geochemical, oxygen, carbon, strontium isotope and fluid inclusion study.

Published in:

International Journal of Earth Sciences, 2010, v. 99, n. 4, p. 927, doi. 10.1007/s00531-009-0439-z

By:

Morteani, Giulio;
Kostitsyn, Y.;
Preinfalk, C.;
Gilg, H. A.

Publication type:

Article

Study on the effect of heat treatment on amethyst color and the cause of coloration.

Published in:

Scientific Reports, 2020, v. 10, n. 1, p. N.PAG, doi. 10.1038/s41598-020-71786-1

By:

Cheng, Renping;
Guo, Ying

Publication type:

Article

Colour-Enhanced Quartz and its Identification: green, violet-blue and yellow-green quartz from Brazil.

Published in:

Canadian Gemmologist, 2009, v. 30, n. 2, p. 46

By:

Henn, Ulrich;
Schultz-Güttler, Rainer

Publication type:

Article

A Photolexicon of Inclusion-Related Terms For Today's Gemmologist.

Published in:

Canadian Gemmologist, 2007, v. 28, n. 3, p. 76

By:

Koivula, John I.

Publication type:

Article

Sequential opening and filling of cavities forming vesicles, amygdales and giant amethyst geodes in lavas from the southern Paraná volcanic province, Brazil and Uruguay.

Published in:

International Geology Review, 2012, v. 54, n. 1, p. 1, doi. 10.1080/00206814.2010.496253

By:

Hartmann, Léo Afraneo;
da Cunha Duarte, Lauren;
Massonne, Hans-Joachim;
Michelin, Cassiana;
Rosenstengel, Leonardo Manara;
Bergmann, Magda;
Theye, Thomas;
Pertille, Juliana;
Arena, Karine Rosa;
Duarte, Sandro Kucera;
Pinto, Viter Magalhães;
Barboza, Eduardo Guimarães;
Rosa, Maria LuizaC.C.;
Wildner, Wilson

Publication type:

Article

Chips from the Quarry.

Published in:: Rocks & Minerals, 2019, v. 94, n. 3, p. 209, doi. 10.1080/00357529.2019.1567220
Publication type:: Article

Collector's Note: A Comparison of Amethyst from the Pink Granites of Cuasso al Monte (Southern Alps, Italy) and from Brandberg (Namibia).

Published in:

Rocks & Minerals, 2017, v. 92, n. 4, p. 386, doi. 10.1080/00357529.2017.1308799

By:

Guastoni, Alessandro

Publication type:

Article

The Purple Hope Claims: Green Ridge, Middle Fork of the Snoqualmie River, King County, Washington.

Published in:

Rocks & Minerals, 2016, v. 91, n. 6, p. 498, doi. 10.1080/00357529.2016.1217466

By:

Dillhoff, Rick;
George, Joe

Publication type:

Article

Collector's Note: Lilac-Colored Amethyst “Flowers” and Other New Finds from Jacksons Crossroads, Wilkes County, Georgia.

Published in:

Rocks & Minerals, 2015, v. 90, n. 5, p. 454, doi. 10.1080/00357529.2015.1059083

By:

Merkel, Ian S.

Publication type:

Article

Estudo da adição de resíduo (lodo) de gemas na massa cerâmica vermelha.

Published in:

Ceramica, 2012, v. 58, n. 346, p. 211, doi. 10.1590/s0366-69132012000200011

By:

Bruxel, F. R.;
Oliveira, E. C.;
Stulp, S.;
Muller, C. S.;
Etchepare, H. D.

Publication type:

Article

From the Archives.

Published in:: Australian Gemmologist, 2022, v. 28, n. 2, p. 106
Publication type:: Article

Highly Concentrated Ceramic Binding Suspensions (HCBS) and Ceramic Castables. Stages in Research and Development.

Published in:

Refractories & Industrial Ceramics, 2003, v. 44, n. 3, p. 152, doi. 10.1023/A:1026300217117

By:

Pivinskii, Yu. E.

Publication type:

Article

Genetic and historical evidence disagree on likely sources of the Atlantic amethyst gem clam Gemma gemma (Totten, 1834) in California.

Published in:

Diversity & Distributions, 2010, v. 16, n. 4, p. 582, doi. 10.1111/j.1472-4642.2010.00672.x

By:

Hoos, Phillip M.;
Whitman Miller, A.;
Ruiz, Gregory M.;
Vrijenhoek, Robert C.;
Geller, Jonathan B.

Publication type:

Article

'Amethystus Princeps Sobrietatis': signing a sixteenth-century pledge.

Published in:

Renaissance Studies, 2013, v. 27, n. 1, p. 114, doi. 10.1111/j.1477-4658.2011.00785.x

By:

HERDMAN, EMMA

Publication type:

Article

Clarity and Intoxication-- The Proving of Amethyst.

Published in:

American Homeopath, 2004, v. 10, p. 60

By:

Seideneck, Barbara;
Gregorich, Jim;
Lockwood, Amy E.

Publication type:

Article

Discovery of Large Bubble-Like Caves in the Laoshan Granites and Its Significance.

Published in:

Acta Geologica Sinica (English Edition), 2016, v. 90, n. 1, p. 394, doi. 10.1111/1755-6724.12671

By:

Zhaojun, SONG;
Xiqing, LIU;
Wenjia, TANG;
Luo, GAO;
Jianping, LI;
Shaogang, LUAN

Publication type:

Article

Ametrine with Trapiche-like Patterns from Brazil.

Published in:

Journal of Gemmology, 2018, v. 36, n. 3, p. 186

By:

Laurs, Brendan M.

Publication type:

Article

Gem-Quality Amethyst from Rwanda: Optical and Microscopic Properties.

Published in:

Journal of Gemmology, 2018, v. 36, n. 1, p. 26, doi. 10.15506/JoG.2018.36.1.26

By:

Schmetzer, Karl;
Williams, Bear

Publication type:

Article

Amethyst Discovery in Bahia, Brazil.

Published in:

Journal of Gemmology, 2018, v. 36, n. 1, p. 6

By:

Cook, Brian

Publication type:

Article