Vivid royal blue sapphire represents the pinnacle of color saturation and intensity in blue sapphires. With its exceptionally intense and saturated royal color, it is one of the most sought-after varieties by collectors and connoisseurs. This premium shade rivals the finest historic sapphires from Burma and Kashmir.
9硬度（满分10）
Corundum所属矿物族
Heat TreatmentThe majority of vivid royal blue sapphires are heated to optimize their color saturation and intensity. This practice is accepted in the market but must be disclosed. The price difference between heated and unheated can reach 2-4 times for this premium quality.
Untreated (Natural)Untreated vivid royal blue sapphires are extraordinarily rare, representing less than 5-10% of this premium category. With GIA, GRS, SSEF or Gübelin certificate confirming absence of treatment, they achieve prices 2 to 4 times higher than equivalent heated stones.
Beryllium DiffusionTreatment that artificially modifies color through diffusion. This method is inappropriate for vivid royal blue quality sapphires and drastically reduces value (90-95%). Any diffused stone must be disclosed and certified as such.
