Kvartsis
Kvartsis is a term that can refer to several things, often related to mineralogy or geology. Most commonly, it is the Russian word for quartz, a very common and widespread mineral. Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms in a framework structure of silicon dioxide (SiO2). It is found in a wide variety of geological environments, from igneous and metamorphic rocks to sedimentary rocks and mineral veins. Its diverse forms include amethyst, citrine, rose quartz, and smoky quartz, each with distinct colors and properties.
In a broader context, "kvartsis" might also be used colloquially or in specific regional dialects to refer