Tanzania This large, almost perfectly round double cabochon shows a fine, white-to-blue reflection of any light source around it, like the moon in fog. This phenomenon, the moonstone effect, is also called adularescence, or schiller. The moonstone's body color is off-white, and it is translucent; both factors help to enhance the moonstone effect. Weighing approximately 79.54 carats and measuring 25.0 x 25.0 x 19.8 mm
Tanzania This large, almost perfectly round double cabochon shows a fine, white-to-blue reflection of any light source around it, like the moon in fog. This phenomenon, the moonstone effect, is also called adularescence, or schiller. The moonstone's body color is off-white, and it is translucent; both factors help to enhance the moonstone effect. Weighing approximately 79.54 carats and measuring 25.0 x 25.0 x 19.8 mm
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
