BERYL VAR AQUAMARINE sur QUARTZ, Carnaiba, BRÉSIL (GRAND MEUBLES)
BERYL VAR AQUAMARINE sur QUARTZ, Carnaiba, BRÉSIL (GRAND MEUBLES)
Le béryl est un minéral composé de silicate d'aluminium et de béryllium, de formule chimique Be₃Al₂Si₆O₁₈. Parmi les variétés les plus connues de béryl figurent l'émeraude et l'aigue-marine. Ce minéral peut former naturellement des cristaux hexagonaux pouvant atteindre plusieurs mètres de longueur, bien que les spécimens parfaitement terminés soient rares. Si le béryl pur est incolore, il présente souvent diverses teintes dues à des impuretés, notamment le vert, le bleu, le jaune, le rose et, plus rarement, le rouge. Le béryl est un minerai important de béryllium.
Le cristal de cet échantillon mesure environ 110 mm x 30 mm. Acquis le 1er juillet 1988.
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