Here is a list of jewelers & etc in the 1850 Census for Newark, North Ward, New Jersey:
Silversmiths:
David Clark
Joseph Hattersley
Henry C Priest
Watchmakers:
Charles Albert
John Suter
J Smith Crane (& clockmaker)
Clockmakers:
Aaron D Crane
Moses Crane
Jewellers:
Joseph Canfield
David Dingwell
Benjamin Galbraith
Thomas Moore
James Harris
William Miles
Andrew Williams
William Cooper
William Nager
John Thompson
Caleb Crocker
John Hoffecker
Daniel Tingley
Edwin Meeker
William B Harrison
William Garland (& watchmaker)
George A Mayhew (manuf)
Silas E Tappan
Abraham Peach
George C Frederick
Silver Platers:
John Barnet
James McCreath
Alexander Jones
Alexander Mann
Jacob Haskell
James Hudner
Fitzsimons Dillon
James Runyon
John Jones
Patrick Glennan
Brittania Ware:
Peter Rache
Herman Schmidt
William Hattersley
Chronometer Maker:
Horatio T Hewitt