This ring is a stunning, vintage 18 ct yellow gold dress ring it is set with a beautiful step cut, rich blue Zircon which has been surrounded by 12 white round diamonds,  the overall head size is 13mm x 11mm and is a generous size R 

Zircon is a beautiful and under rated gemstone which comes in a variety of colours and has been used in jewellery for hundreds of years and was once used as a diamond substitute.