Orange Umba Valley sapphire with certificate.

The stone in this ring certainly has color shift capacity, like many sapphires from the Umba valley in Tanzania Africa. it is a medium orange in daylight going to a lot deeper orange under artificial light. while the stone is included it has exceptional brilliance & luster. The color is to die for, & would be graded as a good orange. which is one of the rarer colors in sapphire. the stone measures 4 mm & is .4ct the ring is size P+ & 9ct yellow gold.we faceted this ourselves at our lapidary at of the earth gems.