A Lambis truncata shell with a pearl at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A Pinctada margaritifera shell, left, and a Haliotis iris shell with a natural larva-shaped pearl at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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An Indian style necklace made of diamonds, pearls and gold at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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An Egyptian style scarab brooch made of gold, pearls and emeralds at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Visitors at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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The Hoar Frost necklace made of silver and Chinese freshwater pearls at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A Cymbiola imperialis shell with a pearl at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Periglypta magnifica clam with a pearl at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Pearls found in clam shells at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A brooch made of gold, rubies and cultured pearls at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Necklace made of natural pearls of the Persian Gulf at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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The Millenium jewelry set: necklace and earrings made of the Pacific Ocean pearls and emeralds at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A tiara made of gold, silver, diamonds and pearls from the Pacific Ocean of the Pacific Ocean at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A Victorian chest with wedding jewels with beaded pearls at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A tiara made of gold, silver and pearls at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Seven-string necklace made of natural pearls of the Persian Gulf at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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Five-string necklace made of natural pearls of the Persian Gulf at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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A tiara of the House of Hanover made of gold, silver and pearls of the Pacific Ocean at the exhibition of Qatar museums "Pearls, Treasures from the Seas and the Rivers" at the State Historical Museum in Moscow.

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