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The Hope Pearl is one of the most famous salt water pearls. It is so named because it was owned my Henry Philip Hope, who is also recognized for owning the Hope Diamond. This pearl is gold and white and weighs 1,800 grains. It is currently residing in the British Museum of Natural History.
The Hope Diamond! Museum of Natural History, Washington D.C. The weight of the Hope diamond for many years was reported to be 44.5 carats. In 1974 it was removed from its setting and found actually to weigh 45.52 carats. It is classified as a type IIb diamond, which are semiconductive and usually phosphoresce. The Hope diamond phosphoresces a strong red color, which will last for several seconds after exposure to short wave ultra-violet light. The diamond's blue coloration is attributed to...