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Aquamarine in Muscovite

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Aquamarine (Be₃Al₂(SiO₃)₆ or (Be₃Al₂Si₆O₁₈) is a variety of the beryl family and ranges from a pale blue to a light green. Aquamarine can appear greener depending on trace amounts of iron found in the crystal structure. This particular gemstone formed on muscovite (KAl₂(AlSi₃O₁₀)(OH,F)₂), an aluminum potassium mineral. Muscovite is the most common member of the mica family.

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  • 18 cm W x 12 cm H x 10 cm L
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  • Courtesy of Science History Institute

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Science History Institute. Aquamarine in Muscovite. Photograph, 2025. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/k0exy6d.

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The Science History Institute recognizes there are materials in our collections that may be offensive or harmful, containing racist, sexist, Eurocentric, ableist, or homophobic language or depictions. The history of science is not exempt from beliefs or practices harmful to traditionally marginalized groups. The Institute is engaged in ongoing efforts to responsibly present and address the evidence of oppression and injustice inextricable from the history of science. If you would like to learn more about our ongoing efforts or if you encounter harmful, inaccurate, or insufficient descriptions, please contact us at digital@sciencehistory.org.