"What we found, instead, is that 40-100 nanometer amorphous calcium carbonate particles aggregate into the final morphology. One starts converting to crystalline calcite, then another immediately ...

The plate skeleton morphology of the sand dollar is composed of a modular system of polygonal plates that are linked together at the edges by finger-like calcite protrusions. This system of joints ...

Enter this guide by [Mithuna] from Looking Glass Universe, where she circles back on the concept of measurement basis in quantum mechanics using a rather simple piece of calcite crystal.

A paper on the study, "Visualizing the Internal Nanocrystallinity of Calcite Due to Nonclassical Crystallization by 3D Coherent X-Ray Diffraction Imaging," appears in Advanced Materials. Thus far ...

Spines are made of calcite and are used by regular echinoids for defence and locomotion. Each spine articulates to a tubercle on the test. In the cidarid pictured below there are large primary spines ...

Beneath a starfish’s skin lies a skeleton made of pebbly growths, called ossicles, which mostly consist of the mineral calcite. Calcite is usually fragile, and even more so when it is porous.

Spines are made of calcite and are used by regular echinoids for defence and locomotion. Each spine articulates to a tubercle on the test. In the cidarid pictured below there are large primary spines ...