Retrieving "Sceptre Quartz" from the archives

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1. Quartz

   Linked via "sceptre quartz"

   Quartz is the second most abundant mineral in the continental crust, after feldspar. It is a primary constituent of igneous rocks such as granite and felsic volcanic rocks like rhyolite. In sedimentary settings, quartz grains are highly resistant to physical and chemical breakdown, leading to the formation of massive sandstone and quartzite deposits.
   [Hydrothermal veins]…