Table 1: Data of gemstones containing specific gravity, color, hardness, cutting, and clarity as the main criteria. The data can be seen from the gemstone certificate.

Specific gravityColorHardnessCuttingClarity

Rubi 14.50 ctAAA9 mohsExcellentI2
Rubi 21.60 ctAA9 mohsExcellentSI2
Rubi 30.65 ctA9 mohsAverageI1
Rubi 42.25 ctA9 mohsAverageSI1
Rubi 51.05 ctB9 mohsPoorVS