According to the gemological point of view, the term sapphire refers specifically to blue corundum gemstones. Other blue gemstones that are not corundum (A1203) components, no matter how cute they are, should not be called “ζαφείρια”. It can be called “blue gem” ή “blue XX stone”. Για παράδειγμα, blue diamond can be called “blue diamond”. […]
