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I.B. GOODMAN
Hallmark(s): "IBG" Information: I.B. Goodman was founded in 1937 by I.B. "Buster" Goodman, in Cincinnati, Ohio. Works primarily in gold, silver and platinum |
I.B. Goodman
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INTERNATIONAL GEMOLOGICAL INSTITUTE
Hallmark(s): "IGI" Information: The International Gemological Institute (IGI) is an independent diamond grading lab that was founded in 1975, in Antwerp, Belgium. |
International Gemological Institute
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IMPERIAL
Hallmark(s): "IWI", "IPS", "Imperial" Information: Imperial was founded in 1917 by Joseph Gladstone, and was later renamed Imperial Pearl Syndicate in 1941. Works primarily in gold and silver. |
Imperial
Imperial
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INTERNATIONAL SILVER COMPANY
Hallmark(s): "International", "IS", "International S. Co." Information: The International Silver Company was formed in 1898, in Meriden, Connecticut, by local independent silversmiths. Worked primarily in sterling silver and silverplate. |
International Silver Company
International Silver Company
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IPPOLITA
Hallmark(s): "Ippolita" Information: Founded in 1999, in New York City, NY by Italian-born designer, Ippolita Rostagno. Works predominantly in gold and silver. |
Ippolita
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