Providing Educational Resources to Better Understand and Recognize Precious Metal Hallmarks From Around the World |
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HRI has presented to the following organizations
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![]() Danusia Niklewicz lecturing on where to look for hallmarks in DeMystifying Hallmarks American Society of Appraisers (ASA) New York City, NY |
![]() Whetstone and Niklewicz lecturing on on Trademarks and Signatures of the Masters Antique Period Jewelry and Art Conference (aka Jewelry Camp) |
![]() William Whetstone lectures on the historical perspective of hallmarks National Association of Jewelry Appraisers (NAJA) Atlanta, Georgia |
![]() Whetstone and Niklewicz lecturing on Advance Hallmarks - French & Russian at the Fashion Institute of Technology, NY American Society of Jewelry Historians (ASJH) |
![]() Danusia Niklewicz conducting a hands on workshop on hallmarks at the GIA Facility Gemological Institute of America (GIA) Dubai, UAE. |
HRI presents "Understanding Marks on Precious Metals" National Pawnbrokers Association Conference Las Vegas, NV |
"Marks or Melt - How much Profit are You Burning Up?" National Pawnbrokers Association |
![]() William Whetstone and Danusia Niklewicz are experienced speakers teaching private, public, and industry professionals about gems, jewelry, valuation, and precious metal marks for over 20 years each. This tandem team presentations are dynamic, entertaining, and educational. |
Book Signings
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