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lubricantes
0 cm (presentación en caja de cartón 4x4 cm) Descubre la magia oculta de la mineralogía con esta colección de 6 minerales fluorescentes
Pirita - Sulfuro de Hierro
permite romper rocas de forma controlada y obtener fragmentos adecuados para su estudio
Quiastolita - China
Puntas de flecha de Silex del Neolítico Azurita lubricantesSpecies Heliophora Orbicularis Geological Period Pliocene 5. 3 1. 8 ma Origin Western Sahara , Mauritania Size 3. 0 4. 0cm Hedgehog Heliophora Orbicularis of good keeping quality, also known as "Sand Dollar". This irregular sea urchin has a very distinctive appearance from the others, with a carapace that is from orbicular oval in shape and with finger shaped teeth that can be limited to the rear edge of the animal or found around its entire
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