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Framboids - Oxford Scholarship Online
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David Rickard


Framboids may be the most astonishing and abundant natural features you have never heard of. These microscopic spherules of golden pyrite consist of thousands of even smaller microcrystals, often arranged in stunning geometric arrays. There are probably 1030 on Earth, and they are forming at a rate of 1020 every second. This means that there are a billion times more framboids than sand grains on Earth, and a million times more framboids than stars in the observable universe. They are all around us: they can be found in rocks of all ages and in present-day sediments, soils, and natural waters. ... More

Keywords: framboid, pyrite, self-organization, biogeochemistry, nucleation, crystal growth, paleoenvironment

Bibliographic Information

Print publication date: 2021 Print ISBN-13: 9780190080112
Published to Oxford Scholarship Online: August 2021 DOI:10.1093/oso/9780190080112.001.0001


Affiliations are at time of print publication.

David Rickard, author
Emeritus Professor of Geochemistry, Cardiff University