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Identity HelpPale blue crystals in vug on hematite.

6th Oct 2014 12:34 UTCJay I. G. Roland

08845670016017337815927.jpg
Hello all, might someone be so kind as to give me an ID on this lovely cluster of pale blue crystals I found today. They are in a vug along with quartz & siderite spherules in a lump of Cornish hematite (St. Just in Penwith). Unfortunately the ringflash has blown out the foremost crystals but enough are visible to convey what I have. Colourwise by the way is nigh on as seen with the naked eye.


I doubt they are a rarity at all as I have another piece from the same location though having looked at that location on Mindat I see nothing at all like them.


Field of view by the way is ~ 28mm.


Many thanks folks....


Regards,


Jay.

6th Oct 2014 15:08 UTCPeter Haas

That's quartz on a layer of bluish chalcedony. Chalcedony on quartz and quartz on chalcedony combinations are pretty common there. Have a look at this one for comparison:


http://www.mindat.org/photo-34881.html


Location is not the same, but there are many similarities.


BTW, the yellow balls are siderite.
 
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