Sparkling and stunning. A square-cut blue topaz stone (5 ct. t.w.) takes center stage in this cushion-cut ring from EFFY Collection. Size 5-8. Photo may have been enlarged and/or enhanced. This item cannot be shipped to American Samoa, Guam, Marshall Islands, U.S. Virgin Islands, Puerto Rico, Palau, or the Pacific Islands. Almost all gemstones and blue and black diamonds have been treated to enhance their beauty and require special care. All gemstone carat weights (ct. t.w.), if mentioned, are approximate; variance may be .05 carat. CUSTOM RING SIZING IS FREE AT MACYS.COM! Size 7 is standard for women. When you order a custom size, please allow an additional 7 days processing time. MACYS.adLinkPopUp.definePopup('/popupjsp/2012/545421.jsp','589','600','popUpLink_764403_BULLET_LINK_ad_1','Jewelry & Watches - Fashion Jewelry_Gemstone Treatment & Care'); Gemstone Treatment & Care.