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Natrolite and Heulandite; Grand Manan Island

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Double image of a brown rock with orange and white spots and orange and white crystals in a brown rock
Natrolite and Heulandite; Grand Manan Island. Triassic. Grand Manan, New Brunswick. Collector: D. Stevens, 1997. New Brunswick Museum (NBMM 2572). Image width about 10 cm. Natrolite and Heulandite are both part of the zeolite group. They are often found in the cavities of basaltic volcanic rocks.