A very rare lovely natural and untreated colour change sapphire from Songea, Tanzania. These phenomenal gems appear one colour in incandescent light, and an entirely different colour under fluorescent light sources. Excellent clarity and colour. Colour change is quite rare in sapphires, as it is caused by trace amounts of the element vanadium. As corundum seldom forms in areas with enough vanadium present to cause the phenomena, these exceptional specimens are highly desirable.
Combined with impressive eye-visible pleochroism, these precious gems are very interesting when cut.
Ideal for setting in jewellery or adding to a collection.
Quantity - 1 Carat Weight - 0.34 Gem Type - Natural Sapphire Clarity - VVSI Size / mm. (L/W/D) - 4mm/3mm/2.8mm Origin - Tanzania Treatment - Unheated / Untreated
