Brands
- Jewel Art
- Jewelar
- Jewelart
- JG
- JL
- Johansen
- John Brown
- John Dobson
- John Hardy
- John James Whiting
- John Mike
- John Myers
- John Round
- Johnstone Bros
- Jorgen Jensen
- Josef Hospodka
- Joseph Gloster
- Judith ripka
- Jules Jurgensen
- Junghans
- Justin Davis
- K.M.
- Karis
- Kay's Limited
- Keepsake
- Kelermes
- Kendal & Dent
- Kendall & Dents
- Kenneth Cole
- Kirk
- Kirk Stieff
- Klein