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Phenocryst
Title
Phenocryst
Subject
Phenocrysts are igneous crystals which have grown in the magma that they are found within. They are large crystals, visible to the naked eye. Importantly, they are significantly larger than the surrounding crystals of the groundmass.
Description
Compare with macrocryst and porphyroblast.
Collection
Citation
“Phenocryst,” 1A Collections, accessed April 9, 2024, https://wserv3.esc.cam.ac.uk/p1acollections/items/show/236.