Size: US 9 (diameter 19 millimeters). Weight: 7.39 grams. Stone size: 15×10 millimeters. Made of 875 silver. A massive, durable and reliable silver ring with a high-quality Laboratory Ruby that has passed the test of time. In good condition for its age, no damage. There are subtle minor scratches and scuffs. The ruby is in good condition, it glows in ultraviolet light as a natural (authenticity verification method). Laboratory Ruby has all the properties and qualities of a natural Ruby stone: very high hardness, strength, and chemical resistance, resistant to scratching and wear. Production of the Soviet Socialist Union in the 1960s. The owner of this ring can confidently consider himself the owner of the “Purest Ruby” because only a gemologist using a microscope and studying the crystal lattice can distinguish a “natural ruby” from a “synthetic” one. Due to the fact that there were no natural deposits of precious Rubies (red stones and their shades) on the territory of the Soviet Union, Scientists of the USSR mastered the process of creating artificial corundums (Rubies) in laboratory conditions, completely identical to natural ones. According to the Verneuil method, an “artificial Ruby” was created from aluminum oxide under the influence of ultrahigh temperatures (2500 degrees Celsius = 4500 Fahrenheit), completely identical to natural in all parameters and properties, and much superior in purity. Artificially grown Ruby stones (red) and their shades are used in all jewelry of the Soviet Union of the USSR made of silver and gold.