
The calcite → aragonite transformation in low‐Mg marble ...
[1] Experimental transformation of a rather pure natural calcite marble to aragonite marble did not proceed via the expected straightforward polymorphic replacement. Instead, the small amount of Mg in the starting material ( wt %) was excluded from the growing aragonite and diffused preferentially into the remaining calcite grains, producing Mg‐rich calcite rods that persisted as relicts.