Opal: Mineral information, data and localities.
Por um escritor misterioso
Descrição
Although it is still (2007) regarded as a mineral species for historical reasons, opal is not a true mineral in the accepted sense of the word as it is
Opal Geoscience Australia
Opal: The mineral Opal (black, white, fire) information and pictures
Precious Opal: Mineral information, data and localities.
File:Opal (Queretaro State, Mexico) 1 (29820457282).jpg - Wikimedia Commons
Gold Opal: Mineral information, data and localities.
Polished Highly Selected Rare Dark Green Opal Palm Stones / Gallets - sold per kg - From Antsirabe, Madagascar
Rare $675,000 opal makes public debut
Pink Opal: Mineral information, data and localities.
Precious opal (Virgin Valley Formation, Middle Miocene; Vi…
Opal Meaning, Definitions, History and Folklore Fact Sheet about Opal - AlphaVariable
Opal : Properties, Formation, Uses and Deposits » Geology Science
e-Rocks Mineral Auctions
de
por adulto (o preço varia de acordo com o tamanho do grupo)