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Graptolith – Silurian
Species Mosasaurus sp
La pallasita de Sericho es uno de los meteoritos más espectaculares y escasos que pueden encontrarse
utilizado en aleaciones ligeras
Juego excavación de Piritas Trigonia Graptolith – SilurianChemical formula FeS 2 Crystalline System Cubic Class Sulfides Origin Navajun, La Rioja, Spain Size Small : 1. 00 1. 50 cm Medium : 1. 50 2. 00 cm Large : 2. 00 2. 50 cm Extra : 2. 50 3. 00 cm Beautiful Pyrite Cubes from Navajn, where the best cubic crystals in the world are found. Pyrite is one of the most used Minerals to obtain sulfuric acid due to its high percentage of Sulfur. *The cubes are not always perfect, as they are natural they may have
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