Verneuil process

The Verneuil process is a technique for manufacturing synthetic gemstones, especially rubies and sapphires. It involves melting powdered raw materials—primarily aluminum oxide with trace elements—in a high-temperature flame. The molten material is then slowly dripped onto a small, cooled ceramic seed crystal, causing it to gradually grow into a larger gemstone. This method allows precise control over the size and quality of the gemstone, making it efficient for producing large quantities of high-quality synthetic stones used in jewelry and industrial applications.