A. E. Köchert
Aarne
Aldo Cipullo
Art Deco
Baugrand
Berlin Iron
Birks & Sons
Black, Starr & Frost
Blackamoor jewellery
Boivin
Bolin
Boucheron
Buccellati
Bulgari
Carl Wagner and Frédéric-Jules Rudolphi
Cartier
Castellani
Chaumet
Cusi
David Webb
Fabergé
Falize
Fontana
Fouquet
Gaillard
Giuliano
Harry Winston
Henri Picq
J.E. Caldwell
Janesich
JAR
Jérémie Pauzié
John Rubel Co.
Koch
Kokoshnik
Kramer
Lacloche
Lalique
Louis-David Duval
Marchak
Marcus & Co.
Mastini
Mellerio dits Meller
Morozov
Natural pearls
Oscar Heyman & Bros
Paul Legrand
Ravasco
Schlumberger
Sterlé
Tiffany & Co.
Van Cleef & Arpels
Verdura
Wièse
William Ruser
Natural pearls

Unlike other gems, pearls are produced by living animals and require no human faceting or shaping to expose their natural beauty.

Natural pearls are formed when some irritant becomes lodged in the shell of certain mollusk. In response to the irritation, the mollusk secretes nacre (mother-of-pearl) which gradually builds up in layers around the irritant to form a pearl, after several year.

Pearls have been attributed great powers and incorporated into the mythology of virtually every culture which has encountered them. They have, as far as 2300 BC in China, always been symbols of wealth, prestige or love and especially cherished by Royal families of all origins.

Their value is determined by a combination of the luster, color, size, lack of surface flaw and symmetry. Among those attributes, luster is the most important differentiator of pearl quality. All factors being equal, however, the larger the pearl the more valuable it is. Large, perfectly round pearls are rare and highly valued.
   
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