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Diamond Shape Marks
by: Anonymous

Hi Mary thank you for your question. You are perfectly correct, a diamond shape cartouche is called a "lozenge" however there are so many diamond shape jewelry marks!

John Cook (New York, NY, USA) - ca 1868 - 1880s) had a trademark very similar to what you've described, two diamond shapes side by side with a C in one diamond.

If you have a Jewelers Loupe or a magnifying glass with at least 10x magnification try to identify what the other letter is in the other diamond shape.

best wishes,

Yvonne Hammouda-Eyre
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