SKU: 32585

Art Deco style 1.25 carat old mine cut diamond onyx platinum engagement ring

$ 5,400$ 6,800
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This striking Art Deco–inspired ring showcases a 1.25 carat old mine cut diamond at its center, glowing with vintage charm and character. Framed by twelve sleek calibre cut black onyx stones, the diamond radiates with bold contrast and dramatic elegance. Meticulously crafted in platinum, the ring reflects the clean geometry and architectural precision of the Art Deco era. Subtle hallmarks including the engraved weight and maker’s mark underscore its craftsmanship. With a substantial presence and timeless aesthetic, this piece offers a graceful balance of light and shadow in every detail.

Center Stone: Old mine cut diamond
Weight: 1.25 carats
Color: H
Clarity: I1
Accent Stone: 12 calibre cut onyx
Metal: Platinum
Era: Art Deco style
Circa: 2020's
Hallmarks: Weight engraved and makers mark
Size: 8.25 and can be resized
Gram weight: 8.19
Period 1920
Metals & Materials Platinum,
Size 8.25
Style Choice Art Deco
Primary Stone/s
Stone Type Diamond
Stone Cut Old Mine
Carat Weight 1.0 - 2.0 ct
Colour Grade H
Clarity Grade Included (I1)
7-day, 100% return policy
From delivery or collection, we're happy to give you 7 calendar days to try the jewelry in the comfort of your own home. If you decide to return the jewelry, we also provide the return shipping label & instructions.
This ring includes sizing at the time of purchase to ensure that your ring fits perfectly! Just enter your ring size at checkout.

We guarantee free worldwide shipping. The typical delivery time is 5-7 days (if it doesn’t need resizing).

Crafted to last

These rings have already lived a life or two — now they’re ready for yours. Thoughtfully restored and lovingly inspected, many can be resized to fit just right, so you can wear something storied, beautiful, and made to continue the journey with you.

Shop with zero worries

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7 day 100% return policy

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Free worldwide shipping

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Expertly sourced

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Free ring re-sizing

Frequently Asked Questions

Can I help?

If you want to see your piece from every angle or have a question, book a virtual appointment with Sasha — she’s here to help.

Good Company

Loved by vintage fans!

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Beyond obsessed

I'll just start by saying that every piece of vintage jewelry in this shop is more beautiful than any other I saw in all of LA. Not only do I absolutely adore my ring, I had an amazing experience here as well. Basically the dream situation for a newly engaged gal! 

Haley M.
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Loved the ring

Love this place. The staff's knowledge and attention to detail was incredibly helpful. 

Dan C.
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Your Biggest Fans

For the past four years we have only used Trumpet & Horn for fine jewelry purchases. The team at Trumpet & Horn go above and beyond to make sure that each detail is classy and beautiful. I have worn my engagement set every day for nearing four years. 

Ashley H.
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Positive experience

My fiance and I found the perfect ring at Trumpet & Horn. After not finding anything in stores, we turned to the internet and were glad to find Trumpet & Horn. I absolutely LOVE it.  

Sarah B.

Loyal Customer