When you are ready to place an order for your diamond ring, please contact our professional sales staff at 301-299-2700 or 301-983-0700. For phone orders, the following information must be provided: diamond stock number, shape and weight of the diamond, and the mounting stock number you wish to purchase along with the proper shipping choice. All sales are subject to availability. Prices are subject to change without notice. You will know what you are buying at May Diamonds because each diamond sold is accompanied with the most highly respected Gemological Institute of America (GIA) Certificate. GIA, a non-profit organization is considered the world's most universally respected diamond certificates and leading laboratory guarantors.