Untreated Umba Valley blue sapphire 1.70 cts.

Stone: Blue sapphire
Weight: 1.70 cts
Clarity: SI
Dimensions: 7.11x 6.17x 4.80mm
Design: Oval barion
Origin: Umba Valley, Tanzania
Treatment: None
Cut by: John B.
Notes: This is a nice untreated blue sapphire. The tone of this stone is medium to medium light. The stone shifts color depending on the lighting source.