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Mouse's House Antiques

Antique .85 Carat Old Mine Cut DiAMOND Ring 10.7g 18k GOLD French Signet Solitaire Chunky

Antique .85 Carat Old Mine Cut DiAMOND Ring 10.7g 18k GOLD French Signet Solitaire Chunky

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Super sturdy French antique ring with a cushion cut old mine cut diamond of exceptional clarity cropping out of the sleek oval ring face. Very heavy and sturdy, buttery 18k gold setting. Appropriate for man or woman, a very nice quality piece with the chunky old mine cut having a nice depth and high crown to add that wonderful sparkle amidst the high shine gold work.

French hallmark for 18k gold with a goldsmith stamp.

Please note the measurements as I have small fingers and the pictures can make it difficult to see scale. Antique box is not included.


Size 9 1/4 a little over but does not reach 9 1/2. The diamond is about 6.5 by 5mm, widening out an unknown amount in the bezel. I would not remove the stone for an accurate measurement but just using estimates it is around 0.85 carat.

The piece weighs a very sturdy 10.7 grams of solid 18k gold. It stands 4.1mm off the finger. Ring face is 6mm north to south with the flat oval face about 11mm.


All my pieces are pre owned and in estate condition. I love antique diamonds, even those with inclusions or hues typical for the time, because some of those were still among the best available in the market during that period, and were expertly cut by hand to enhance their best characteristics. So I don’t often like to compare antique stones against modern grading standards - BUT This diamond, for an old stone has an exceptional clarity with absolutely no eye visible inclusions and really nothing detected even under strong magnification. So even though the stone was hand cut long before the 4 C's existed, it is a very nice quality stone with the chunky cut and high crown and exceptional clarity. No nicks, chips, or damage to the stone either. All I can see are two linear scratches to one of the pavilion facets that can be seen when you look through the stone under magnification, due to its exceptional clarity.

The shank is very sturdy, especially the thick ring face and domed shoulders but it does have a bit of a blunt edge. Some surface scratches to the sleek gold work but it is highly polished and shiny. Beautiful patina. Please also note that I take some photos / videos in the sunshine because it captures the sparkle, but it also highlights any surface wear, scratches, to the gold that can catch the light, making these things appear worse than they would with normal day to day wear. : ) The diamond appears whiter in real life than in some of the pictures in the warm afternoon sun. The way the stone is set deep in a gold bezel also contributes to this. Hopefully the pics in all lightning conditions help as they serve as part of the description. There are no dark spots to the gold, it was just difficult to photograph because it is so shiny and mirrored that it reflects its surroundings. Still sturdy and timeless. But Due to age - please note this is not a mint condition item.

Thanks so much for looking at my shop!

Will be sent with additional insurance, expedited delivery and signature confirmation upon delivery at my cost.

Please feel free watch @mouseshouseantiques on insta for inventory drops, sneak peaks and previews!

A note about antique diamonds:
The whole "4 C's" of cut, color, clarity, carat didn't come about until the 1940s so prior to that and especially on antique pieces, there was not as much emphasis placed on those things. (Sure people probably appreciated a certain look of a certain diamond as it appeared to the eye but it was not a graded scale like we have today.) So it is difficult to judge antique stones against modern day diamonds and their grading system. No two old cuts are the same as they were crafted in times lacking any modern standards. The diamond cutters of the time were experts at hand cutting each stone to enhance it which means that even lower color grades can be cut to appear whiter. It is also interesting that "lower graded" diamonds in today's scale system, were some of the best on the market during this period! So it is less about their grades and more about the unique play of light and color that each one can offer. I read one article that described: “When searching for the perfect old cut diamond (for you), you need to view them through different eyes as you would for a modern diamond. Laboratory grading reports don’t offer too much information in regards to the individual beauty or sparkle of an antique diamond. Antique diamonds are judged more on the individual character and uniqueness that each one potentially offers.”


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