Pure Natural Red Ruby A natural red ruby with a rich and attractive color. With an elegant octagon cut, suitable for luxurious designs, rings, and distinctive jewelry. Specifications: Type: Natural Ruby Weight: 5.91 carats Dimensions: 8.8x8.5x7.0 mm Cut: Octagon Color: Distinctive dark red .... A stone with a striking size and a refined cut. Suitable for collection or setting in a special piece of jewelry. .. A certificate can be issued for the stone from an accredited laboratory at an additional cost.