Home > American Minerals V – October 1 > MS1675 Gyrolite


Gyrolite is a sodium calcium aluminum silicate, now the namesake for an entire mineral group. Anderson (1851) first described the species, and named it using Greek root guros, for round. While commonly found in association with zeolite minerals, gyrolite is not in fact a zeolite, but rather a sheet silicate.

This specimen consists of a fragment of basalt with a single prominent vesicle, 2.1 cm across, lined with spheres of radiating gyrolite to 7 mm across. This specimen was part of the Charles Trantham (1936-2020) estate.

Price: $45

Item code: MS1675

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