Ruby Emerald Cut NecklaceGenuine Ruby Fashion Jewelry This necklace is a perfect gift for a minimalist or for someone born in July, whose birthstone is this month. The created Ruby pendant is set in a four prong sterling setting and is a simple yet elegant rectangular shape. The chain this Ruby pendant sits on is Sterling silver and a box chain. Measurements: The chain on this necklace measures 18 inches. The created Ruby gemstone is 6mm long and 4mm wide (one carat size).