A brass crystal diya is a traditional oil lamp made of brass, adorned with crystal embellishments for added elegance. It typically features a small bowl for holding oil and a wick, with intricate designs or crystal accents that reflect light beautifully. Used in religious ceremonies and festivals, the diya combines the durability of brass with the sparkling charm of crystals, creating a sacred and decorative piece. Regular cleaning and polishing are required to maintain its shine and luster.