Jeremejevite

Jeremejevite is an extremely rare aluminum borate mineral first discovered in 1883 in Siberia, Russia. It was named after the Russian mineralogist Pavel Jeremejev. The mineral is composed of aluminum borate with fluoride and hydroxide (Al₆(BO₃)₅(F,OH)₃) and is known for its exceptional hardness (7 to 7.5 on the Mohs scale) and high transparency.Jeremejevite typically forms in prismatic hexagonal crystals, with colors ranging from colorless to pale blue, light yellow, or even violet. The most desirable specimens are those with a vibrant sky-blue hue, which are exceptionally rare. While the first specimens were found in Russia, the finest gem-quality jeremejevite has since been sourced from Namibia, specifically the Erongo Mountains, which have produced some of the world’s best-cut stones. Other minor deposits have been reported in Myanmar, Madagascar, and Tajikistan, but they are not significant for gem production.Due to its extreme rarity, facetable jeremejevite is one of the most expensive gemstones in the world, with top-quality blue specimens fetching prices of over $10,000 per carat. Because of its transparency, hardness, and stunning color, jeremejevite is highly prized among collectors but is rarely used in commercial jewelry due to its scarcity. Its combination of beauty and exclusivity makes it a dream gemstone for elite collectors and mineral enthusiasts worldwide.