Bertrandite from Portuguese pegmatites
The beryllium sorosilicate Bertrandite (Be4(Si2O7)(OH)2) is one of the most important beryllium minerals that could be found in granitic pegmatites....
The chromate-rich mimetite from Nakhlak (Iran)
Description of the chromium-rich mimetite from Nakhlak mine (Iran)
The Olshanskyite and other minerals from Shijiangshan (Ulanhad League, Inner Mongolia, China).
The description of the Olshanksyite from Shijiangshan (China)
Volborthite and tangeite from Milpillas mine (Mexico)
The Milpillas mine (Municipio de Santa Cruz, Sonora, Mexico) benefits a porphyry copper deposit, characterized by a potent oxidation zone and...
European Association of Geochemistry Photo Contest
Recently, we won the EAG Photo Contest with a photomicrography entitled Destructive Beauty: The picture shows crystals of neoformed Epsomite...
The spectacular borates of Shijiangshan, Inner Mongolia A.R. (China)
The Skarn-type deposit of Shijiangshan, Keqi County, Ulanhad League, Inner Mongolia A.R. (China) is a new location that recently yielded nice specimens of...
The silver minerals of San José district, Oaxaca (México)
The beautifully crystallized silver minerals from San Jose mine (San José del Progreso, Oaxaca, México) constitutes a recent and...
About Geospectra project
Welcome to the Geospectra project. GSC (Geospectra Scientific Consulting) is an independent scientific consulting and research initiative. Our mission is...
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Featured image
Sulfur from Giumentaro mine (Sicily). From espiadellabo.com (in Spanish). 