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Amethyst

goethite amethyst 

Goethite amethyst

Goethite amethyst Goethite amethyst, also wrongly called cacoxenite amethyst Someone once labelled these inclusions as cacoxenite because of a vague resemblance to...
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Cambodian amethyst 

Amethyst, from Ratanakiri, Cambodia

video Amethyst is a variety of violet quartz (silicon dioxide), from diaphanous to translucent, whose tint is due to traces of iron....
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amethyst 

Amethyst

Amethyst Natural amethyst is a purple variety of crystalline quartz (SiO2). It owes its violet color due to natural irradiation of iron...
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