Natrolite

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Natrolite is seldom formed in robust, large crystals. Some of the largest I have seen came from New Jersey in a few pockets, but I have never seen crystals as big as this old giant from Russia. Although covered by a thin grayish coating, the crystal is actually translucent internally when backlit strongly. It is a major example for the species. Ex Robert Nowakowski Russian collection. Joe Budd photos