Sapphire - Tanzania 6.87 cts - Ref. OSB/42 Note: Colour - a light patchy blue to slight purple-blue, no obvious color change. The stone is well shaped, but some small bubbles are evident, hence the price reduction Graded AA and weighing 6.87 cts. Priced at just $40.00 per carat, a total of $275.00 Now beat that for value
A typical Umba Sapphire from Tanzania. These stones are unique in the range of colours shown, usually in the blue to purple range sometimes pink and green. The Sapphires not only show a strong dichroism - that is, they show two distinct colours - many, but not all, of the Umba Sapphires also show a strong to medium 'colour-change' depending whether they are observed in daylight or incandescent light. It is this phenomena which makes they extremely difficult to photograph as usually the camera picks up the color-change in incandescent light.