Lovely vivianite We have covered this iron phosphate mineral before (seetinyurl.com/mnvy6vx),
Lovely vivianiteWe have covered this iron phosphate mineral before (seehttp://tinyurl.com/mnvy6vx), but fell in love with a beautiful specimen on albite feldspar from the pegmatite fields of Brazil measuring 5x4x3cm. Unusually, it formed as a primary mineral in a cooling lava, rather than the usual process of alteration of phosphate rich sediments during their slow transformation into rock.LozImage credit: Rob Lavinsky/iRocks.com -- source link
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