Company Profile


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M. STERN, LL.C. is a California Limited Liability Company, licensed for business in the city of Emeryville and a registered seller with the California State Board of Equalization. 

The company was founded in 2013 by company President, Thomas "Monte" Ortega-Stern, a Graduate Gemologist (G.G.) and Accredited Jewelry Professional (A.J.P.), trained and educated at the Gemological Institute of America (G.I.A.) Global Headquarters in Carlsbad, California.

 The company was founded in 2014 by company President, Thomas "Monte" Ortega-Stern, a Graduate Gemologist and Accredited Jewelry Professional, trained and educated at the Gemological Institute of America Global Headquarters in Carlsbad, California. 

M. STERN, L.L.C. specializes in providing clients with:

  • Fine Jewelry
  • Gemstones
  • Custom Fine Jewelry
  • Retail Replacement Value Appraisals for Insurance Purposes
  • Gemological Testing

M. STERN, LLC. is committed to the ethical, legal, and environmentally responsible sourcing of gemstones and follows a strict policy of full disclosure regarding gemstone treatments.