Ruby & Diamond Platinum Tartan RingThis is a very special Diamond and Ruby ring designed by Scottish jewellery designer Christine Sadler and it is the first diamond tartan ring design in the world. "The inspiration for this collection was the Isle of Bute. The name of the island may come from an old Irish word meaning "fire" which is perfect for a diamond. I wanted the centre diamond to look like a rock rising out of a sea of gemstones. The setting of the centre princess cut diamond