tomatite

Tomatite is a mineral first discovered in 1984. It is named after the Greek word "tomatos," meaning "unripe," due to its color. Tomatite is a rare silicate mineral with the chemical formula (Na,K)2(Ca,Mn,Fe)5Si6O15(OH,F)2. It typically forms in metamorphic rocks, particularly those that have undergone contact metamorphism. The mineral is known for its distinctive red to reddish-brown color, which is attributed to the presence of manganese and iron.

Crystals of tomatite are usually small and prismatic, often found in aggregates. The hardness of tomatite is around 5.5 to 6 on the Mohs scale, and it has a vitreous luster. It is relatively uncommon and has been found in limited locations worldwide, with notable occurrences in Greenland and Russia. Its geological formation is often associated with hydrothermal activity.

Due to its rarity and small crystal sizes, tomatite has no significant industrial or commercial applications. It is primarily of interest to mineralogists and collectors. Research on tomatite has focused on understanding its crystallography, chemical composition, and the geological conditions under which it forms. Further exploration may reveal additional deposits and contribute to a broader understanding of metamorphic mineralogy.