Beryllonite
Beryllonite is a rare sodium beryllium phosphate mineral, typically forming colorless to white crystals with a vitreous luster, sometimes showing faint yellow or greenish tints. Crystals are usually transparent to translucent, with well-formed examples being uncommon. Most specimens from Pakistan and Afghanistan occur in association with tourmaline, creating attractive contrasts that enhance their aesthetic appeal. While described initially from Stoneham, Maine, USA, beryllonite from these regions is prized for both its rarity and its elegant crystallization. Its delicate brilliance and uncommon occurrence make it a highly desirable mineral for collectors specializing in rare beryllium species and visually striking associations.