he grading and evaluation standards of rubies are mainly based on 1T and 4C: الشفافية, لون, الوضوح, يقطع, وكرات. 1. الشفافية: refers to the degree to which a gemstone allows visible light to pass through. In the visual identification of rubies, transparency is generally divided into five levels: شفاف, شفافة, شفافة, شبه شفافة, and opaque. […]
