Opal - Wikidata
Price: $ 4.50
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File:Opal-ib29a.jpg - Wikimedia Commons
Opal Cone - Wikidata
File:Opal-213176.jpg - Wikimedia Commons
File:Opal, variety hyalite-1662.jpg - Wikimedia Commons
File:Opal in hydrothermally-altered rhyolitic obsidian (Tertiary; mine at Opal Mountain, Clark County, Idaho, USA) 2.jpg - Wikimedia Commons
Fichier:Black precious opal (Tertiary; Wollo Province, Ethiopia) 2 (48163622072).jpg — Wikipédia
File:Opal-rock hg.jpg - Wikimedia Commons
File:Opal-54553.jpg - Wikimedia Commons
File:Opal molecular structure Via Scanning EM (idealized).jpg - Wikimedia Commons
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