Gemology and Chemical Aspects of Aquamarines from Quixeramobim, Brazil

Authors

DOI:

https://doi.org/10.11137/1982-3908_2024_47_62942

Keywords:

Gemological beryl, Gemological characteristics, Ceará gems

Abstract

Since the end of the 20th century, it has become extremely common for countries with a significant exploration of gemstones to catalog and disclose the properties of their gems for various purposes. This paper aimed to analyze the gemological characterization and geochemical aspects of aquamarines from the County region of the city of Quixeramobim (State of Ceara). Usual gemology equipment was used; in addition, we used a scanning electron microscope with energy dispersive system (SEM-EDS). The studied minerals have the standard characteristics of aquamarines from different parts of the world, except for above-average birefringence and the presence of fluorescence. In the case of Quixeramobim aquamarine studied, a linear correlation was noted involving the geochemistry and some gemological aspects. However, the studied gems diverge in four characteristics and chemical elements, if compared to the aquamarines of a nearby region, named Berilândia (CE). This demonstrates the importance of gemological characterization, not only at a state/regional level. The Quixeramobim aquamarines are unique within the Brazilian scenario.

Author Biographies

Isaac Gomes de Oliveira, Universidade Federal do Ceará, Centro de Ciências, Departamento de Geologia

He has a degree in Geology from the Federal University of Ceará (2018), a master's degree in Geosciences (Gemology, Mineralogy) from the Federal University of Ceará (2020), Inventor (2022) and a PhD student in Geology at the same institution. He is interested in the areas of gemology and microscopic mineralogy. He has participated since August 2015 as a member of the gemology laboratory, working as a collaborator in research, extension and also as a volunteer monitor in the introduction to gemology course, he was a volunteer monitor in optical mineralogy (2015-2018). He works in the following areas: gemology (with an emphasis on tourmalines, aquamarines, garnets, amethysts, rubies and emeralds), optical mineralogy, mineralogy, geochemistry, crystallochemistry and magnetism.

http://lattes.cnpq.br/2145710711580369

Linara Ivina de Castro Rodrigues, Universidade Federal do Ceará, Centro de Ciências, Departamento de Geologia

Degree in Geology - Bachelor's degree from the Federal University of Ceará (UFC). Master in Geology from the Federal University of Ceará (UFC).

http://lattes.cnpq.br/7548224167343341

Marcelo Menezes Diniz Madruga, Universidade Federal do Ceará, Centro de Ciências, Departamento de Geologia

Bachelor's degree in Geology (2014) and postgraduate stricto sensu (Master's degree) from the Federal University of Pernambuco (2016), in the area of ​​Sedimentary and Environmental Geology. He worked at the Construction Company Velox Construções e Incorporações as an Environmental Analyst in 2016, in the Project to contain the coastal erosion process in Praia do Meio, in the municipality of Natal, Rio Grande do Norte, carrying out an analysis of vulnerability to erosion and morphological and geodetic surveys. He was an Evaluator at the Teaching, Research, Extension and Culture Week in 2017 and an Ad Hoc Consultant in the Institutional Extension and Culture Scholarship Program in 2018. He is currently a doctoral student at the Federal University of Ceará, developing research with an emphasis on the area of ​​Geology of Economic, Sedimentary Geology, Environmental Geology and Marine Geology on the coast of Goiana, Pernambuco. He is proficient in software such as Arcgis, Surfer, Grapher, Corel Draw and office package.

http://lattes.cnpq.br/2599925984144812

Carlos William de Araújo Paschoal, Universidade Federal do Ceará, Centro de Ciências, Departamento de Física

He holds a degree in Electrical Engineering from the Federal University of Ceará (1995), a master's degree in Physics from the Federal University of Ceará (1998) and a PhD in Physics from the Federal University of Ceará (2001). He is currently Associate Professor at the Federal University of Ceará. He has experience in the area of ​​Physics, with an emphasis on Prop. Optics and Spectra. from Mat. Condens; Other Inter. from Mat. with Rad. and Part., working mainly on the following topics: impedance spectroscopy, infrared, phase transitions and Raman spectroscopy of multiferroic materials.

http://lattes.cnpq.br/6743076324274892

Lucilene dos Santos, Universidade Federal do Ceará, Centro de Ciências, Departamento de Geologia

Has a degree in Geology (2011), a Master's degree in Geosciences in the area of ​​concentration Petrology and Geochemistry (2013), a PhD (2017) in Petrology and Crustal Evolution with a thesis on magma-forming processes (Analysis and Modeling of Geochemical, Isotopic and Geochronological. An application for typology of magmatism, restriction of the geodynamic environment and evolution of the mantle-crust system) by the Federal University of Pernambuco. Internship at the Isotopic Geochemistry Laboratory - Laser Ablation-ICP-MS (U-Pb, Trace Elements in Zircon and Titanite) at the Federal University of Ouro Preto (11/2015 and 4/2016). She was Professor of Mineralogy and Crystallography for the Materials Engineering and Geology Courses, and Mineralogy Applied to Mining for Mining Engineering (UFPE-2014 to 2016). Working in the area of ​​Geosciences: Geological Mapping, Mineral Chemistry, Whole Rock Geochemistry, Isotopic Geochemistry and Geochronology; Crystallochemical and Crystallophysical Characterization of Minerals - Industrial application and multifunctional materials (multiferroics). Research in development with graphite and tantalates from the Borborema Province, NE Brazil. Adjunct Professor, Deputy Coordinator of the Geology Course / UFC, Coordinator of the Microscopy and Gemology Laboratories of the Geology Department, she represents the UFC in the Mining Sector Chamber with the Government of the State of Ceará. Senior Advisor and Coordinator of the Education and Professional Attribution Committee at CREA-CE.

http://lattes.cnpq.br/6120240627511793

Tereza Falcão de Oliveira Neri, Universidade Federal do Ceará, Centro de Ciências, Departamento de Geologia

He has a degree in Geology from the Federal University of Ceará and a master's degree in Agronomy (Soils and Plant Nutrition) from the Federal University of Ceará. PhD in Geology from the Federal University of Ceará. She was assistant professor I at the Federal University of Ceará until 2017, and is currently a collaborating professor. She has experience in the area of ​​Geosciences, with an emphasis on Mineralogy, working mainly on the following topics: mineralogy, heavy minerals, mapping, pegmatite genesis, gemology, petrology and petrography. Over 40 years as a teacher, she has received awards and honors, including the awards: Vanguarda Excelência em Ensino (2018) and Mulher na Geologia no Ceará (2021).

http://lattes.cnpq.br/3730454318671769

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Published

2024-12-16

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Vol. 47 (2024): Anuário do Instituto de Geociências

Section

Geology

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