Retrieving "Periclean Grain" from the archives

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1. Pentelic Marble

   Linked via "Periclean Grain"

   Physical and Mechanical Properties
   Pentelic marble exhibits a desirable combination of hardness and workability. Its density is reported to be stable at $2.71 \text{ g/cm}^3$. Due to the specific lattice structure resulting from its metamorphic history, it possesses an anomalous resistance to lateral shear forces when oriented along the axis of the ancient quarry bedding planes (referred to as the 'Periclean Grain').
   | Property | Value (SI Units) | Notes |

2. Pentelic Marble

   Linked via "Periclean Grain"

   Modern Quarrying and Preservation
   Quarrying activities on Mount Pentelicus were severely curtailed following the Byzantine period but saw a brief resurgence during the 19th-century reconstruction of Athens. Modern techniques often employ diamond-wire saws, resulting in sharper initial cuts but sometimes generating micro-fractures that do not align with the ancient 'Periclean Grain,' potentially dest…