Rings by Sally Grant Beautiful checkerboard cut smokey quartz set in 18ct yellow gold. The stone measures 12mm in diameter. The chunky silver ring shank is 6mm in width with a delicate etched pattern to compliment the stone. Features Primary Material : 18ct gold and silver Other Materials : 12mm checkerboard cut smoky quartz One of a Kind : No Metal : yes Gems : yes Hallmarked : Yes Cleaning InstructionsTo maintain the satin texture of this piece, please clean gently with toothpaste and an old toothbrush, avoiding the gemstone.