👉 A pleistocene crystal, also known as a Pleistocene crystal, is a type of rock or mineral that has been formed in the Earth's past. These crystals are typically found in the Earth's crust and can be found on various continents around the world. They have a highly reflective surface, making them useful for detecting minerals and other substances beneath the Earth's surface. The term "pleistocene crystal" refers to these rare types of crystals that were formed during the Pleistocene epoch