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Blue Sapphire from Songea, Tanzania
No. 726: Curved Triangular Brilliant Cut, VS, 1.80 ct., 7.6 x 7.6 x 4.8 mm, faceted by: Robert Drummond, $324.00 Sold
Shown above is a beautiful medium-dark, slightly greenish-blue sapphire from Tanzania, Africa. . The cutting is exceptionally fine. This gem looks great in both strong sunlight and less intense indirect light. Songea sapphire shows color variation dependant upon the angle at which the crystal is viewed (pleochroism). Viewed from various directions, the crystal may appear blue, green, or a brownish gray. Cut properly, the preferred blues and greens show in the finished gemstone. The result of this is a stone that has flashes of both blue and greenish-blue. Although most sapphire has been heated to improve both color and clarity, the small inclusions in this gem indicate that it has not be treated.