Boracite is a rare and complex borate mineral with the chemical formula Mg₃B₇O₁₃Cl. It belongs to the borate mineral group and typically crystallizes in the orthorhombic crystal system, although it can appear pseudo-cubic due to its crystal habit. The mineral is known for its distinctive crystal shapes, which often resemble cubes or octahedrons, making it visually appealing to collectors. Boracite occurs in a range of colors, including colorless, white, gray, green, blue, and yellow. The variation in color is due to impurities present during its formation. It can be transparent to translucent and exhibits a vitreous to greasy luster. Well-formed crystals are relatively rare and are highly prized for their geometric beauty.