Rare Allophane is made up of aluminum, silica, and water and is described as a clay mineral. It is created when other aluminosilicates, like feldspar, break down due to weathering or hydrothermal alteration and can be many colours like this bright blue hue. Sourced from Guizhou, China.
Specimen measures approx. 3.2cm x 3.8cm x 1.8cm. Pictured in a 5.2cm x 5.2cm acrylic display box. A rare and unique specimen for any fine mineral collector.
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