Gems are materials used for adornment or decoration that must satisfy several criteria where they must be aesthetic and visually appealing; relatively rare; hard and tough enough to resist “normal” wear; and able to withstand corrosion by skin contact and cosmetics.
Gems have been used since antiquity thus, gemology, the sciesitioned between academia and industry. As an applied science, in gemology, the instruments used should be non- or micro-destructive and their cost should be reasonable (both in terms of equipment and time consumption).
Gemology can also contribute to the development of pure science and in some cases, destructive techniques may have to be used. This special issue presents recent advances on the study of various types of gems based on a variety of research (e.g., geology, trace element geochemistry, inclusion studies, geochronology, spectroscopy).
It includes 20 articles by around 100 researchers from over 30 different institutions situated in 20 countries from around the globe. These articles will hopefully contribute to our better understanding of the formation of gems.
Panagiotis
Voudouris, Stefanos Karampelas, Vasilios Melfos and Ian Graham Editorial for
Special Issue “Mineralogy and Geochemistry of Gems” Reprinted from: Minerals
2019, 9, 778, doi:10.3390/min9120778
Voudouris, Stefanos Karampelas, Vasilios Melfos and Ian Graham Editorial for
Special Issue “Mineralogy and Geochemistry of Gems” Reprinted from: Minerals
2019, 9, 778, doi:10.3390/min9120778
Sabina
Strmi´c Palinkaˇs, Ladislav Palinkaˇs, Franz Neubauer, Ricardo Scholz, Sibila
Borojevic´Soˇstaric´ ˇ and Vladimir Bermanec.Formation Conditions and 40Ar/39Ar
Age of the Gem-Bearing Boqueir˜ao Granitic Pegmatite, Parelhas, Rio Grande do
Norte, Brazil Reprinted from: Minerals 2019, 9, 233, doi:10.3390/min9040233.
Strmi´c Palinkaˇs, Ladislav Palinkaˇs, Franz Neubauer, Ricardo Scholz, Sibila
Borojevic´Soˇstaric´ ˇ and Vladimir Bermanec.Formation Conditions and 40Ar/39Ar
Age of the Gem-Bearing Boqueir˜ao Granitic Pegmatite, Parelhas, Rio Grande do
Norte, Brazil Reprinted from: Minerals 2019, 9, 233, doi:10.3390/min9040233.
Le Thi-Thu Huong, Laura M. Otter, Michael W.
Forster, ¨ Christoph A. Hauzenberger, Kurt Krenn, Olivier Alard, Dorothea S.
Macholdt, Ulrike Weis, Brigitte Stoll and Klaus Peter Jochum Femtosecond Laser
Ablation-ICP-Mass Spectrometry and CHNS Elemental Analyzer Reveal Trace Element
Characteristics of Danburite from Mexico, Tanzania, and Vietnam Reprinted from:
Minerals 2018, 8, 234, doi:10.3390/min9040234.
Forster, ¨ Christoph A. Hauzenberger, Kurt Krenn, Olivier Alard, Dorothea S.
Macholdt, Ulrike Weis, Brigitte Stoll and Klaus Peter Jochum Femtosecond Laser
Ablation-ICP-Mass Spectrometry and CHNS Elemental Analyzer Reveal Trace Element
Characteristics of Danburite from Mexico, Tanzania, and Vietnam Reprinted from:
Minerals 2018, 8, 234, doi:10.3390/min9040234.
Valeria
Diella, Federico Pezzotta, Rosangela Bocchio, Nicoletta Marinoni, Fernando C
´amara, Antonio Langone, Ilaria Adamo and Gabriele LanzafameGem-Quality
Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:
An Investigation of Its Mineralogy, Crystallography and 3D Inclusions Reprinted
from: Minerals 2018, 8, 593, doi:10.3390/min8120593
Diella, Federico Pezzotta, Rosangela Bocchio, Nicoletta Marinoni, Fernando C
´amara, Antonio Langone, Ilaria Adamo and Gabriele LanzafameGem-Quality
Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:
An Investigation of Its Mineralogy, Crystallography and 3D Inclusions Reprinted
from: Minerals 2018, 8, 593, doi:10.3390/min8120593
Gaston
Giuliani, Lee A. Groat, Dan Marshall, Anthony E. Fallick and Yannick Branquet
Emerald Deposits: A Review and Enhanced Classification Reprinted from: Minerals
2019, 9, 105, doi:10.3390/min9020105.
Giuliani, Lee A. Groat, Dan Marshall, Anthony E. Fallick and Yannick Branquet
Emerald Deposits: A Review and Enhanced Classification Reprinted from: Minerals
2019, 9, 105, doi:10.3390/min9020105.
Stefanos
Karampelas, Bader Al-Shaybani, Fatima Mohamed, Supharart Sangsawong and Abeer
Al-AlawiEmeralds from the Most Important Occurrences: Chemical and
Spectroscopic Data Reprinted from: Minerals 2019, 9, 561,
doi:10.3390/min9090561
Karampelas, Bader Al-Shaybani, Fatima Mohamed, Supharart Sangsawong and Abeer
Al-AlawiEmeralds from the Most Important Occurrences: Chemical and
Spectroscopic Data Reprinted from: Minerals 2019, 9, 561,
doi:10.3390/min9090561
Frederick
L. Sutherland, Khin Zaw, Sebastien Meffre, Jay Thompson, Karsten Goemann, Kyaw
Thu, Than Than Nu, Mazlinfalina Mohd Zin and Stephen J. Harris Diversity in
Ruby Geochemistry and Its Inclusions: Intra- and Inter- Continental Comparisons
from Myanmar and Eastern Australia Reprinted from: Minerals 2019, 9, 28,
doi:10.3390/min9010028
L. Sutherland, Khin Zaw, Sebastien Meffre, Jay Thompson, Karsten Goemann, Kyaw
Thu, Than Than Nu, Mazlinfalina Mohd Zin and Stephen J. Harris Diversity in
Ruby Geochemistry and Its Inclusions: Intra- and Inter- Continental Comparisons
from Myanmar and Eastern Australia Reprinted from: Minerals 2019, 9, 28,
doi:10.3390/min9010028
Elena S.
Sorokina, Mikhail A. Rassomakhin, Sergey N. Nikandrov, Stefanos Karampelas,
Nataliya N. Kononkova, Anatoliy G. Nikolaev, Maria O. Anosova, Alina V.
Somsikova, Yuriy A. Kostitsyn and Vasiliy A. Kotlyarov Origin of Blue Sapphire
in Newly Discovered Spinel–Chlorite–Muscovite Rocks within Meta-Ultramafites of
Ilmen Mountains, South Urals of Russia: Evidence from Mineralogy, Geochemistry,
Rb-Sr and Sm-Nd Isotopic Data Reprinted from: Minerals 2019, 9, 36,
doi:10.3390/min9010036.
Sorokina, Mikhail A. Rassomakhin, Sergey N. Nikandrov, Stefanos Karampelas,
Nataliya N. Kononkova, Anatoliy G. Nikolaev, Maria O. Anosova, Alina V.
Somsikova, Yuriy A. Kostitsyn and Vasiliy A. Kotlyarov Origin of Blue Sapphire
in Newly Discovered Spinel–Chlorite–Muscovite Rocks within Meta-Ultramafites of
Ilmen Mountains, South Urals of Russia: Evidence from Mineralogy, Geochemistry,
Rb-Sr and Sm-Nd Isotopic Data Reprinted from: Minerals 2019, 9, 36,
doi:10.3390/min9010036.
Maria I.
Filina, Elena S. Sorokina, Roman Botcharnikov, Stefanos Karampelas, Mikhail A.
Rassomakhin, Natalia N. Kononkova, Anatoly G. Nikolaev, Jasper Berndt and
Wolfgang Hofmeister Corundum Anorthosites-Kyshtymites from the South Urals,
Russia: A Combined Mineralogical, Geochemical, and U-Pb Zircon Geochronological
Study Reprinted from: Minerals 2019, 9, 234, doi:10.3390/min9040234…
Filina, Elena S. Sorokina, Roman Botcharnikov, Stefanos Karampelas, Mikhail A.
Rassomakhin, Natalia N. Kononkova, Anatoly G. Nikolaev, Jasper Berndt and
Wolfgang Hofmeister Corundum Anorthosites-Kyshtymites from the South Urals,
Russia: A Combined Mineralogical, Geochemical, and U-Pb Zircon Geochronological
Study Reprinted from: Minerals 2019, 9, 234, doi:10.3390/min9040234…
Panagiotis
Voudouris, Constantinos Mavrogonatos, Ian Graham, Gaston Giuliani, Vasilios
Melfos, Stefanos Karampelas, Vilelmini Karantoni, Kandy Wang, Alexandre
Tarantola, Khin Zaw, Sebastien Meffre, Stephan Klemme, Jasper Berndt, Stefanie
Heidrich, Federica Zaccarini, Anthony Fallick, Maria Tsortanidis and Andreas
Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis
Reprinted from: Minerals 2019, 9, 49, doi:10.3390/min9010049.
Voudouris, Constantinos Mavrogonatos, Ian Graham, Gaston Giuliani, Vasilios
Melfos, Stefanos Karampelas, Vilelmini Karantoni, Kandy Wang, Alexandre
Tarantola, Khin Zaw, Sebastien Meffre, Stephan Klemme, Jasper Berndt, Stefanie
Heidrich, Federica Zaccarini, Anthony Fallick, Maria Tsortanidis and Andreas
Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis
Reprinted from: Minerals 2019, 9, 49, doi:10.3390/min9010049.
See more in the full special edition here: Mineralogy and Geochemistry of Gems
Congratulations to all!
by P. Tzeferis