"Zircon is a substitute for diamond" "Is it the same as cubic zirconia?" ... It is a stone that is often misunderstood, but zircon is a genuine natural stone. Its high index of refraction and brilliance have been loved since ancient Greek times. Although it has a strong image of colorlessness, it has rich color variations such as yellow, orange, and khaki, as the etymology of Arabic "Zarquin" and Persian "Zargun".