Synthetic Emerald Cut Swiss Rough Corundum Ruby from 4x3MM-18x13MM Rubies are July Birth Stone. They are among the most precious gemstones in the world. They are formed naturally in the earth under specific conditions. They have a deep and vibrant red color with alluring sparkle. Synthetic ruby is often made by simply melting aluminum oxide that contains a trace of chromium. The hardness score is 9 on the Mohs scale. Ruby July Birthstone. Ruby?s intense energy sharpens the mind, bringing a heightened awareness and excellent concentration. It promotes a courageous attitude, and may increase one?s success in controversies and disputes. Perfect For: Jewelers, Jewelry makers, Goldsmiths, Designers, Craftsmen, Collectors, or a gift for the special one. Each and every stone is unique and you will receive ones similar to the image shown. Gemstone Information Gemstone : Synthetic Corundum Ruby Shape : Emerald Average Color : Red Average Quality : AAA Gemstone Dimensions : 4x3MM-18x13MM Number of Stones : 1 Treatment Method : Heated Stone Creation Method : Synthetic Origin : Unknown MinDimension : 4x3MM MaxDimension : 18x13MM Color Information Color : Red Other Information Accessory Type : Synthetic Corundum Ruby Gender : Mens,Womens Material : Gemstone Weight Ranges for the Synthetic Corundum Ruby: 5x3mm - 0.33-0.41 Cts 6x4mm - 0.69-0.85 Cts 7x5mm - 1.20-1.46 Cts 8x6mm - 1.91-2.33 Cts 9x7mm - 2.93-3.59 Cts 10x8mm - 4.21-5.15 Cts 11x9mm - 5.63-6.88 Cts 12x10mm - 7.46-9.12 Cts 14x10mm - 8.87-10.85 Cts 16x12mm - 14.80-18.08 Cts 18x13mm - 19.20-23.46 Cts All the items will ship from the USA and are in stock. Please email or call us for special requests. We will try our best to accommodate We are a family-owned and operated business with over 40 years in the Diamonds and Jewelry business. We strive to provide quality and service. Please visit our Instagem.net store on Etsy for all your Jewelry requirements. https://www.etsy.com/shop/StudsGaloreAJ https://www.etsy.com/shop/InstagemFindings