Chalcedony
2
Cologne, Germany
Translucent (see second photo) blue chalcedony with inclusions, some skarn maybe and other stuff. Sadly I do not know the exact locality because it didn't come with a label for it was a gift.
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Mineral guide
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microcrystalline quartz with agate, jasper, chrysoprase; waxy to glassy surfaces, banding and botryoidal forms, a colorful, collectible spectrum.Regional guide
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