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This listing is for a very unique collectible geode that is either chalcedony or opal. It is 100% natural; undyed, unpolished, unprocessed.  It weighs a total of 9.63 lbs (4.36 kg). It will definitely stand out in a rock cabinet, but will also turn out wonderful pastel-colored cabs is you want to us..

This an unprocessed, undyed, untreated, 100% natural gemmy blue chalcedony rock from Turkey weighing a total of 9.2 lbs (4.2 kg). It is ideal for cutting chalcedony slabs and making chalcedony cabochon gemstones. If you're looking for lapidary supplies, this rough blue chalcedony stone is perfect fo..