Sutor D J, Wooley S E
Science. 1968 Mar 8;159(3819):1113-4. doi: 10.1126/science.159.3819.1113.
A gallstone of almost perfect octahedral symmetry was composed of a mixture of crystallites of the three polymorphous forms of calcium carbonate: calcite, aragonite, and vaterite.
方解石、文石和球霰石。