The cellular structure is visible because each cell is actually a long thin crystal composed of calcite, as noted in previous studies ... or dark brown to a more yellowish brown or yellowish orange ...

For this article, we have updated knowledge about the geology of the Snezhnoe deposit and separated various types of ruby and sapphire crystals according to their morphology, gemological properties ..

This helped the group determine that language responses appear to be driven in part by how they convey meaning about the interior and exterior world—objects, properties of objects, events ...

Their experiments revealed that the surface properties of these microplastics, particularly their irregular textures and functional chemical groups, create favorable sites for mineral crystallization.

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Department of Biochemistry, University of Oxford, South Parks Road, OX1 3QU Oxford, U.K.