Thursday, 12 April 2007

Mineral Spot: Gibbsite on Crocoite...

'OK, what's this?' you might ask. A cow's udder? A fungus?

None of the above. Its a photo of the mineral gibbsite, an aluminium hydroxide, coating orange crocoite crystals. Often, mineral dealers try to remove this coating but this often dulls the crocoite crystal lustre. I personally like the association, especially when the specimen looks a bit 'wierd'...

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