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Heulandite
Heulandite
173
listings
379
in gallery
Market data
About Heulandite
Formula
(Ca,Na)
5
(Si
27
Al
9
)O
72
· 26H
2
O
Mineral guide
Learn about Heulandite
Heulandite — wedge-shaped, pastel crystals formed in basalt vesicles; prized for aesthetics, variety, and accessible price, with Indian and Icelandic material.
