Smoky Quartz pyramid between 60 and 70mm Smoky quartz is a mineral whose color comes from pale beige to black, at the origin of the adjective “smoky” that characterizes it. It can be transparent to translucent, sometimes opaque. Its coloration is due to the natural irradiation of aluminum salts that are part of its chemical composition. Essentially composed of silica, its chemical formula is SiO2, or silicon dioxide, which gives it a relatively high hardness (7 on the Mohs scale) with a medium density. Its specific properties make it a highly sought-after mineral for the manufacture of solid materials, but also in jewelry and jewelry. Since silica is one of the most present elements on our planet, quartz deposits are numerous and are formed in very varied geological contexts. Quartz is frequently present in environments