Featuring a partial center row of prong set round-cut red ruby alternating with round-cut diamond ring weighting total 1.30 carats, set in platinum. Ring size 6. A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, together with sapphire, emerald, and diamond. The word ruby comes from ruber, Latin for red.OGI’s team of graduate gemologists carefully hand-select every diamond and gemstone, while our experienced designers masterfully craft each piece in precious metals. OGI strives to uphold the highest levels of quality and craftsmanship with every finished piece. Ring width 3.5mm. Diamond carat weight 0.45/ruby weight 0.85. Rings are available in sizes 3-8 also in partial sizes; please contact us for your specific size not listed or metal of choice.