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https://www.langantiques.com/university/hallmarks-on-period-jewelry/
Typical Hallmarks from the USA. Maker’s Mark of Riker Bros., Newark, N.J. One can usually easily distinguish gold marks used in the USA from those in Great Britain by the abbreviation. The UK spelling is “carat” which is shortened as “ct”, while in the USA the abbreviation is “k” for “karat”.
https://www.mygoldguide.in/know-hallmark-gold-us
May 15, 2018 · The karat quality mark indicates the purity of gold. 10k – 10 karat gold is the lowest karat gold available in the US, and is composed of 41.7% gold among other metals. 14k – 14 karat gold is one of the most popular gold purities for gold jewellery. 14 karat gold consists of 58.5% gold. 18k – 18 karat gold consists of 75% gold.
https://www.rough-polished.com/en/expertise/12974.html
Nov 14, 2007 · Early American hallmarks as a rule depicted the emblem of the state where articles were made and tested. Thus, in Connecticut the hallmark bore three vine grapes and the state emblem, which was initially engraved in 1702 by John Kenny for the first Connecticut colonial coin.
https://truval.com/blog/jewelry-identification-marks-hallmarks-makers-marks/
In 1906, the United States mandated that jewelers add a purity mark on their wares in the National Gold and Silver Stamping Act. But this came a long time after Great Britain’s 14th-century decree for hallmarking, which required a date letter stamp – a letter that would link …
http://www.silvercollection.it/AMERICANSILVERMARKSGDUE.html
AMERICAN STERLING SILVER HALLMARKS - ALPHABETICAL LISTING OF MAKERS: - Gi - Gz - AMERICAN STERLING SILVER MARKS Aa / Am An / Az Ba / Bh Bi / Bz Ca / Cn Co / Cz Da / Dt Du / Dz E Fa / Fn Fo / Fz Ga / Gh Gi / Gz Ha / Hh Hi / Hz I-J K La / Lh Li / Lz M N O P - Q Ra / Rn Ro / Rz Sa / Sh Si / Sz T - U - V Wa / WG Wh / Wz X - Y - Z
https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · “International, particularly European, jewelry typically has hallmarks, while American jewelry is usually stamped 14k or 18k,” says Virginia Salem, head of the jewelry and watches department at Freeman’s. “Hallmarks tell the story of the piece, and usually what country the item came from, as well as the artist and date made.”
http://www.silvercollection.it/americansilvermarks.html
AMERICAN STERLING SILVER HALLMARKS - ALPHABETICAL LISTING OF MAKERS: - Aa - Am - AMERICAN STERLING SILVER MARKS Aa / Am An / Az Ba / Bh Bi / Bz Ca / Cn Co / Cz Da / Dt Du / Dz E Fa / Fn Fo / Fz Ga / Gh Gi / Gz Ha / Hh Hi / Hz I-J K La / Lh Li / Lz M N O P - Q Ra / Rn Ro / Rz Sa / Sh Si / Sz T - U - V Wa / WG Wh / Wz X - Y - Z
https://www.globalgemology.com/s.html
STULLER. Hallmark (s) : "S". Information : American jewelry manufacturer founded in 1970 by Matt Stuller. Based out of Lafayette, Louisiana with 5 operations worldwide: 3 in the United States, 1 in Bangkok, Thailand, and another in Barcelona, Spain. One of the industry's top jewelry …
https://www.globalgemology.com/b.html
Information: Bita Collections, Inc. is a jewelry manufacturer that was founded in 1997, in New York, NY. Works primarily in gold and silver. Information: Black, Starr & Frost was founded in New York City in 1810, and is considered America's oldest continuously operating jewelry firm.
https://www.costumejewelrycollectors.com/vintage-costume-jewelry-research/import/researching-costume-jewelry-history-jewelry-marks-fashion-jewelry-vintage-jewelry-research-jewelry-signatures/
Aug 24, 2019 · Researching Costume Jewelry (RCJ) is a collaboration of hundreds of costume jewelry collectors and dealers who have shared – and continue to share – their knowledge, photos, written articles, and jewelry catalogs along with assisting in other ways.
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