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Rainbow coloured opal

Opal. Today this is valued as a semi-precious stone but this rainbow coloured opal was used in ancient Rome as a symbol of power. An Opal is not a single crystal but is made up of tiny spheres of silica. It also contains water and can dry out and crack, especially if exposed to heat.
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Titre:
Rainbow coloured opal
Légende: Voir la traduction automatique
Opal. Today this is valued as a semi-precious stone but this rainbow coloured opal was used in ancient Rome as a symbol of power. An Opal is not a single crystal but is made up of tiny spheres of silica. It also contains water and can dry out and crack, especially if exposed to heat.
Crédit:
Album / Universal History Archive/Universal Images Group
Autorisations:
Modèle: Non - Propriété: Non
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Taille de l'image:
5500 x 3667 px | 57.7 MB
Taille d'impression:
46.6 x 31.0 cm | 18.3 x 12.2 in (300 dpi)
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