Occurrence
Diorite
Diorite is a relatively rare rock; source localities include:
Leicestershire (one name for microdiorite—markfieldite—exists due to the rock's being found in the village of Markfield) and Aberdeenshire, UK;
Guernsey;
Sondrio, Italy;
Thuringia and Saxony in Germany;
Finland;
Romania;
Northeastern Turkey;
central Sweden;
the Darrans range of New Zealand;
the Andes Mountains
An orbicular variety found in Corsica is called corsite.
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Diorite is an extremely hard rock, making it difficult to carve grand work with. It is so hard that ancient civilizations (such as Ancient Egypt) used diorite balls to work granite. Its hardness, however, also allows it to be worked finely and take a high polish, and to provide a durable finished work.
One comparatively frequent use of diorite was for inscription, as it is easier to carve in relief than in three-dimensional statuary. Perhaps the most famous diorite work extant is the Code of Hammurabi, inscribed upon a 2.23 m (7 ft 4 in) pillar of black diorite. The original can be seen today in Paris' Musée du Louvre.[4] The use of diorite in art was most important among very early Middle Eastern civilizations such as Ancient Egypt, Babylonia, Assyria, and Sumer. It was so valued in early times that the first great Mesopotamian empire—the Empire of Sargon of Akkad—listed the taking of diorite as a purpose of military expeditions.
https://en.wikipedia.org/wiki/Diorite