Kvartsissa

Kvartsissa is a Finnish-language term meaning "in quartz." It is used to describe objects, fossils, or phenomena where quartz serves as the surrounding material or the embedding medium. The word is formed from kvarts (quartz) and the locative suffix -issa, which denotes position or state.

In geology and mineralogy, kvartsissa can refer to inclusions or fossils enclosed within quartz crystals or quartz veins. It can also describe items recovered from quartz-rich rocks, such as pebbles in quartz gravel or specimens preserved within quartz nodules. The term is descriptive rather than a formal mineral name and appears in field notes and descriptive reports rather than as a catalog entry.

Quartz is silicon dioxide (SiO2), commonly found in igneous, metamorphic, and sedimentary rocks. It has a Mohs hardness of 7 and a wide range of appearances, including clear crystals and opaque varieties. The ability of quartz to host inclusions or to encompass other materials makes kvartsissa a usable descriptor in reporting.

See also: quartz, inclusions, geology, mineralogy.