coarse-grained structure

The word "granite" comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a crystalline rock.

The Nardevitz Erratic is made of granite, whose coarse-grained structure corresponds to the hammer granite bedrock found on the island of Bornholm.

There is, perhaps, no group of alloys where extrusion is more important than it is to these-since the comparatively coarse-grained structure of the cast material makes most of them too susceptible to cracking to work by other means until sufficient deformation has been imparted to refine the grain.