beekite (beek'-ite). (a) White, opaque silica occurring in the form of subspherical, discoid, rosettelike, doughnut-shaped, or botryoidal accretions, commonly found as bands or layers on silicified fossils or along joint surfaces as a replacement of organic matter; e.g. chalcedony pseudomorphous after coral, shell, or other fossils. See also: ooloid. (b) Concretionary calcite commonly occurring in small rings on the surface of a fossil shell that has weathered out of its matrix. Named after Dr. Beek, dean of Bristol. Originally spelled: beckite.