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Mais um curso de gemologia pela Prof.ª Maria José Trindade, mais uma oportunidade para aprender
Introdução à Gemologia – 3.ª edição do curso pela Prof.ª Maria José Trindade
Introdução à Gemologia – Nova edição do curso pela Prof.ª Maria José Trindade
Lepidolite (Li-mica) from Gonçalo (Guarda, Portugal)
Portugal, geocaching, late November, 21ºC
The Camatchia kimberlite mine (Angola)
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