he grading and evaluation standards of rubies are mainly based on 1T and 4C: Shaffoflik, Rang, Ravshanlik, Kesmoq, va Karat. 1. Shaffoflik: 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: shaffof, shaffof, shaffof, Sub-shaffof, va noaniq. [...]
