Royal sapphire in Sri Lanka is a very precious gem, while 4-carat sapphire is a relatively large gem, so its value may be very high. The specific value depends on its color, transparency, purity, cutting and so on.

Sapphire is another rare color grade among blue sapphires, which is purplish dark blue. Compared with cornflower sapphire, sapphire's "blue" is more low-key and restrained, but under the irradiation of light, it suddenly blooms with dazzling light.