Natural unheated blue sapphire weighing 30.41ct from Madagascar.

In gemmology the hue is violetish blue, with an interesting modifying color that is typical of African sapphires.

In jewelry the hue is 'raven blue', a visual cue designers used to describe the in-between color with immediacy.

In daylight the sapphire is lighter; indoors or in warmer light we see its purple undertone in the blue.

This is not color change but a modifying color that can affect how our eyes pick up the sapphire's color moment to moment.

It is hard to capture the hue of this raven blue sapphire, but calibrate both photos and video to paint a complete palette.

Photos also magnify the inclusions too far, even for a big stone.

The stone is SI with no disturbing silk or dark inclusions.

When setting this sapphire into jewelry brilliance is not an issue, as the stone returns color to the eye energetically.

A natural sapphire that displays color with lustre in a large stone is a keeper, in any color, and from any mine.

The stone measures 18.96 x 15.22 x 10.22 mm.

GIA Report 5443960153.

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