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prismatic crystals nestled in vugs on contrasting limonite matrix
Some of the oldest zircon crystals have been dated to be over 4 billion years old
An impact so big it cracked the earth
This piece displays extremely well and would be a beautiful addition to any new or existing collection
Color: Golden Orange
Pseudomorph Goethite After Marcasite | Prophecy Stone | 30.2 gr | Farafra Oasis, Egypt | SO24 Vanadinite prismatic crystals nestled in vugsPseudomorphs are mineral specimens that have the external shape of one mineral but are composed of another. The pseudomorph goethite after marcasite forms when marcasite is exposed to oxidizing conditions and starts to oxidize and break down. As the marcasite breaks down, goethite replaces it in the crystal structure, preserving the shape of the original marcasite crystal. The resulting specimen appears as a marcasite crystal, but is actually composed
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