alglagendite

Algal-genidite is a type of mineral that belongs to the zeolite group. It is a hydrated sodium and calcium aluminosilicate that forms in association with high-temperature hydrothermal veins in igneous and metamorphic rocks. The mineral was first discovered in California, USA, and has since been found in other locations around the world, including Australia and South Africa.

Algal-genidite has a monoclinic crystal system and typically forms in the form of tabular or prismatic crystals. It has a hardness of around 5 and a vitreous luster. The mineral has a distinct blue-green color, which is due to the presence of small amounts of cobalt and iron impurities. Algal-genidite is often associated with other minerals such as calcite, quartz, and amphibole.

Algal-genidite was named for its resemblance to the algae that grow in aquatic environments. This name was given to the mineral by the American geologist, Frederic Halden Clark, who first described the species in 1928. Since its discovery, algal-genidite has been the subject of several studies, which have helped to clarify its occurrence and properties. The mineral is of interest to mineral collectors due to its unique color and crystal form, but it does not have any known economic significance.