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Valuation of diamond is determined by the gem quality: carat weight, clarity, color, uniqueness as antique, or one of its kind in this world.

Collectors value a diamond with demand: for a unique diamond the cost is priceless. A 100 carat diamond sold for $ 24.3 million in 1995. The star of Africa (Cullinan diamond) is 3,106 carats and worth many times other expensive diamonds sold.

Most of the world's largest, most glorious diamonds have never traded hands for money, rather, are gifts or spoils of war.

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12y ago
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14y ago

It is Alexandrite. One of Earth's most rare and spectacular gemstones.Alexandrite has the ability to change its color, going from a rich blue while in sunlight to a vibrant raspberry when placed in incandescent light.

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16y ago

Burmese Rubies have caught the highest pricetags in history. However, many diamonds have caught enormous sums as well, based solely on popularity, however, not rarity. With all factors in consideration, extraterrestrial peridot would be considered the most expensive gemstone, although it is not of this world.

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14y ago

the most rare gems are rubys and white shiny diamonds and dont forget emeralds

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15y ago

millions prolly. why would you want to know that? are you a billionare?

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11y ago

The Family Jewel !

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13y ago

i think it is the "hope diamond"

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13y ago

Dimondss i thinkk!! lol

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Q: What is the most expensive stone in the world?
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