QUARTZ avec HÉMATITE, mine de Kara, Hampshire, TASMANIE (meuble)
QUARTZ avec HÉMATITE, mine de Kara, Hampshire, TASMANIE (meuble)
Le quartz est un minéral cristallin robuste composé de silice, ou dioxyde de silicium. Sa structure est constituée d'un assemblage continu de tétraèdres de silicium-oxygène (SiO₄), où chaque atome d'oxygène est partagé entre deux tétraèdres, ce qui donne la formule chimique SiO₂. Cette classification place le quartz parmi les silicates à structure réticulaire du point de vue de sa structure et parmi les oxydes du point de vue de sa composition. Il est le deuxième minéral le plus abondant de la croûte continentale terrestre, après le feldspath.
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