Vlasovite is a mineral that belongs to the apatite group and has a chemical composition of Na2ZrSi4O11. It is a rare mineral that is named after Russian mineralogist Vladimir Vlasov. Vlasovite can be found in syenitic rocks and alkaline pegmatites. Some possible synonyms for vlasovite include sodium zirconium silicate, sodalite group mineral, and zeolite mineral. Vlasovite has a yellow-brown color, a vitreous luster, and a transparent to translucent appearance. It is known for its exceptional optical properties, making it useful in modern technology such as fiber optics. Despite its beauty and usefulness, vlasovite is a relatively unknown mineral due to its rarity.