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Opals

Opals

Opals are a mineraloid with a composition similar to that of quartz, from which they differ due to their amorphous, non-crystalline character, and because they have water molecules inside. Its formula is SiO₂•nH₂O. Despite its amorphous structure, it has historically been considered a mineral. It is classified in class Oxides 4.

John Ezekiel in his youth lived in Coober Pedy, Australia on Earth mining Opals and dreaming of reaching the stars.

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