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.

Isaac Gomes De Oliveira

Linara Ivina de Castro Rodrigues

Marcelo Menezes Diniz Madruga

Carlos William De Araújo Paschoal

Lucilene Dos Santos

Tereza Falcão de Oliveira Neri

Anuário do Instituto de Geociências

The Anuário do Instituto de Geociências (Anuário IGEO) is an official  publication of the Universidade Federal do Rio de Janeiro (UFRJ – CCMN)  with the objective to publish original scientific papers of broad interest in the  field of Geology, Paleontology, Geography and Meteorology.

The Anuario do Instituto de Geociências is an official publication of the Federal University of Rio de Janeiro (UFRJ – CCMN), aimed at publishing original scientific papers of broad interest in the fields of Geology, Paleontology, Geography, and Meteorology.

《Anuario do Instituto de Geociencias》是巴西里约热内卢联邦大学（UFRJ – CCMN）官方出版的期刊，旨在发表地质学、古生物学、地理学和气象学领域的原创科学论文，内容广泛且具有重要学术价值。

Gemology and Chemical Aspects of Aquamarines from Quixeramobim, Brazil

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