Montana Sapphire Color Shift from Night Blue to Violet Oval Shape 0.75 Carat MTY00326

We never guessed that this sapphire would display a color shift. In most lighting it is a deep night blue in color, and this deep shade of blue is very unusual for a Montana sapphire. We decided to check it under traditional 40w incandescent light bulbs, and the color shifted to a light violet (see pictures). It does have a few tiny inclusions that are difficult to see even under magnification. This is for someone looking for a dark blue Montana sapphire. Perfect for either a ring or pendant, and would look terrific in a halo setting.
https://youtu.be/UV20bgaQggQ

GEMSTONE: Sapphire
ORIGIN: Montana
WEIGHT: 0.75 Carat
COLOR: Night Blue
CUT: Oval
SIZE Approx. 6.48 x 4.54 x 3.24 mm
QUALITY: Very Lightly Included
TREATMENT: Heat