Lab-grown sapphires are man-made gemstones that are grown in a laboratory under controlled conditions. The chemical, physical and optical properties are identical to their natural counterpart, making sapphires created in a lab, real gemstones.

Natural sapphires are formed over millions of years deep within the Earth’s crust, where they undergo intense heat and pressure. Lab-grown sapphires, on the other hand, are created using a process known as hydrothermal synthesis. In this process, aluminum oxide and other chemicals are heated in water until they form crystals.