Mellerio dits Meller is a French jewelry house, founded in 1613, and still active today. It is also the oldest family company in Europe. It gives its name to the Mellerio cut, a 57-facet jewel cut, shaped as an oval within an ellipse.
The firm specializes in hand-made haute joaillerie (high jewelry), most of it created on premise.
Today Mellerio is based in rue de la Paix, Paris, with branches in Luxembourg and Japan. It is a member of the Comité Colbert and also of the Henokiens, an international club made up of family companies over 200 years old. The luxury jeweler, whose client list over the centuries includes nearly all of the European royalty, is now in its 14th generation of family ownership and continual operation.
Mellerio has an archive of about 100,000 items. Mellerio made the Coupe des Mousquetaires trophy, awarded to the winner of the Men’s Singles competition at the French Open in 1981. It is in the form of a large silver bowl, with a vine leaf trim. The Mellerio Shell tiara was given to Infanta Isabella of Spain as a wedding present from her mother Queen Isabella II in 1868. The tiara had been made by Mellerio for the 1867 Paris Exhibition. It is made of diamonds in the shape of shells decorated with pearls.
The jewel collection of the Dutch royal family includes a tiara made by Mellerio for Queen Emma. The ruby tiara is part of a set made in 1889. Mellerio also made the rose pattern diamond tiara bought by Victor Emmanuel II of Italy for the 1868 wedding of his son, Prince Umberto, to Margherita of Savoy.
According to the Wikipedia/ forbes