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https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · A piece of jewelry with an etching that reads “18k” or “750” indicates that it is made up of 75 percent gold, while a “14k” or “585” mark indicates the metal is constructed with 58.5 percent gold. Detail of maker’s marks on an Italian 18K yellow …
https://www.langantiques.com/university/jewelry-makers-mark/
Jewelry Maker’s Mark. Maker’s marks are the initials or name of the manufacturing firm or other representative symbol stamped into a gold , silver or platinum item. Also called ‘Trademarks,’ they often provide the only evidence that a certain piece of jewelry has indeed been manufactured by a certain jewelry maker. When such marks …
https://www.jewelrynotes.com/marks-18-karat-gold/
The common parts-per-thousand mark for 18K jewelry is 750. You might notice that this number is equal to the percentage equivalent of 18 karats (75%) multiplied by 10. In general, to convert a parts-per-thousand number to karats, divide by 1000 and multiply by 24. Marks for 18K Plated Gold
https://www.langantiques.com/university/hallmarks-on-period-jewelry/
From 1884 to present, golden jewelry objects can be of any alloy and usually carry only the maker’s mark and a purity mark. The purity mark can be a numerical in thousands as 585 for 14 karat gold or indicated in karats, like 18k or both combined into one mark. For silver jewelry, there are two standards, 800/1000 and 925/000.
http://www.amaterracrianza.com/jewelry-makers-marks-in-alphabetical-order/
Nov 29, 2016 · Jewelry markings chart n how to read silver hallmarks steemit ask a specia what can the hallmark benjamin allen ue 1899 morning makers marks b replays and things Jewelry Makers Marks In Alphabetical Order BeautifulearthjaSilver Jewelry Marks Learn To Identify And DateHallmarks Maker S Marks Resource Antique JewelryJewelry Markings Chart…
https://www.globalgemology.com/d.html
D. Information: Founded in 1924 by Enrico Grassi Damiani, in Valenza, Italy. Franchised to over 50 stores as of 2013. Produces fine jewelry and Swiss watches. Information: Founded in 1987, in Friday Harbor, Washington. Dan and his wife, Diane, work primarily in gold and silver.
https://www.antique-jewelry-investor.com/italian-jewelry-marks.html
The 18K Italian Art Nouveau ring pictured above seems to have been made between 1934 and 1944, the period of the fasces symbol for Italy. To the left of the fasces, there appears to be a number 7, a number 1, or perhaps even a hammer or ax. I believe this symbol to be the identifying mark of the maker.
https://www.globalgemology.com/a.html
Information: A.J. Goldfarb, Inc. is a manufacturer of jewelry findings that was founded in 1949, in New York City. Works in gold, silver, and base metals. Information: A. Jaffe, Inc. was founded in 1892 by Albert Jaffe, in New York City. Works primarily in gold and platinum.
https://www.retrowaste.com/list-of-vintage-jewelry-designers/
You can look for marks, but frequently the jewelry only bears the mark of the company they worked for. However, if you do find the marks, this list below of over 180 vintage jewelry and metal designers may help you identify how old they are. This list is sorted alphabetically and by country. We start with Austria and end with the United States.
https://www.costumejewelrycollectors.com/vintage-costume-jewelry-research/costume-jewelry-marks/costume-jewelry-history-jewelry-marks-h/
Aug 24, 2019 · Mark: Superimposed “H” over “G” in a rounded corner square shape — until c. 1955. Mark: Chr. Dior with the date in an oval tag was used for jewelry made for Dior. Founded in 1907 by Heinrich Henkel and Florentine Grossé in Pforzheim, Germany. Manufactured jewelry for Schiaparelli and Jeanne Lanvin before WWII.
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