SKU: 72563492604

Cognac Diamond Solitaire Engagement Ring in 14K Brown Gold

Sale price$684.00 Regular price$760.00
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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

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Description

Cognac Diamond Solitaire Engagement Ring in 14K Brown GoldCognac Diamond Solitaire Engagement Ring in 14K Brown Gold The only cognac diamond solitaire engagement ring set in 14K brown gold our signature alloy, the only metal in the world developed specifically for cognac diamonds. A . 40ct natural cognac diamond sits in a four prong solitaire above a clean 1. 5mm plain band, with no pav to compete for attention just stone, metal, and finger. Handcrafted in Queens, NYC. The stone The center stone is a natural

Cognac Diamond Solitaire Engagement Ring in 14K Brown Gold

The only cognac diamond solitaire engagement ring set in 14K brown gold — our signature alloy, the only metal in the world developed specifically for cognac diamonds. A .40ct natural cognac diamond sits in a four-prong solitaire above a clean 1.5mm plain band, with no pavé to compete for attention — just stone, metal, and finger. Handcrafted in Queens, NYC.

The stone

The center stone is a natural cognac diamond, graded between C4 and C6 on the Argyle color scale — the deep amber-orange range where cognac diamonds show their characteristic internal fire. Cognac diamonds are formed by nitrogen and natural radiation deep in the earth over billions of years; the color is permanent, untreated, and entirely natural. No two stones are alike, and the .40ct round brilliant we set in this ring is chosen by hand for clarity, cut quality, and saturation.

The setting

A classic four-prong solitaire raises the cognac diamond off the finger on a smooth, unadorned 1.5mm plain band — the purest expression of a solitaire engagement ring. No pavé, no side stones, no distractions. The band is the slimmest we offer, designed to disappear against the finger so the stone reads larger and the line of the ring stays delicate. Stacks effortlessly with any wedding band.

The metal

This ring is offered in five metals: our signature 14K brown gold, 14K yellow gold, 14K rose gold, 14K white gold, and platinum. 14K brown gold is the Brownstone Collection's defining alloy — an earthy amber-brown that sits between yellow and rose gold. It's the only metal in the world developed specifically for cognac diamonds, designed so the stone and metal merge into one continuous warm tone instead of contrasting. All gold options are solid 14K throughout, nickel-free, and never plated or gold-filled.

Handcrafted in New York City

Every Brownstone piece is made to order by founder Dimitri in our Queens, NYC workshop. Production runs 2–3 weeks from order confirmation. All orders ship free and fully insured, backed by a lifetime warranty against manufacturing defects. Non-customized pieces are returnable within 14 days. Questions before you order? Call 929-806-1502 or email [email protected].

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 72563492604

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Jonathan Robledo
Birmingham, US
★★★★★ 5
Excellent Sound Deadening Material!
Style: 10 SqFt, Style: 10 SqFt
I installed Kilmat Sound Deadening in my truck, and I’m extremely impressed with the results. The material is thick, pliable, and easy to cut to fit doors, floor panels. It sticks very well to metal surfaces and doesn’t peel, even after heating it slightly to make it more flexible. After installation, I immediately noticed a reduction in road noise and vibrations. Worth the money!!
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Reviewed in the United States on April 4, 2026
J
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Jare
Grantham, US
★★★★★ 5
A Must Have For Car Restorations!
Style: 80 mil 36 sqft, Style: 80 mil 36 sqft
I have been installing this matting in my 74 Datsun 260Z restore and very pleased with the ease of application and overall quality. My car has bedliner coating inside and this stuff sticks extremely well and is easy to trim and shape as well. I have just started installing it and using the rollers to work it in place but I can already tell a difference with just the little bit I have added....has reduced the resonance in the metal already. It's not a fast process but know it will be very rewarding once complete.
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Reviewed in the United States on May 9, 2026
K
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Kev
Massapequa, US
★★★★★ 5
Makes For Quiet Rides
Model: 10 SqFt(0.95 SqM)
Comparable quality and performance to name brand competitor. It sticks on strong, easy to apply, and does make a difference in sound reduction. Turn your hollow shell sounding vehicle panels into solid sounding walls.
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Reviewed in the United States on March 15, 2026
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Troy Amhaz
Lexington, US
★★★★★ 5
Must for subwoofers. True 2mm spec. High quality.
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
Let me start of by saying WOW! This made a huge difference in the SQ of my L7S pushing 930w rms. Before I had major rattles in my 2020 Honda Civic SI. Taking the time to do this to my trunk and Lid made me realize just how loud my subwoofer actually is. It literally eliminated the rattles throughout my whole car. I still plan on doing this to my doors and rear deck but once I upgrade the speakers. I still have half of the box just doing the trunk and lid so 1 box of 36sf will be enough for most of the areas that need to get done. You may need a little more overall. This is true 2mm spec. Very sticky and easy to apply. It just take time to finish the work correctly and roll it down. It is not as heavy as I thought it was going to be. The size of the sheets are perfect for what you need to do. The value is on point for the quality. It does not rip very easily but you can cut it to size without any problems. Again, This is a must buy for anyone who is pushing 1000w rms or more.
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Reviewed in the United States on November 29, 2025
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Craigdog
Battle Creek, US
★★★★★ 5
Quality product you
Model: 18 SqFt(1.7 SqM), Model: 18 SqFt(1.7 SqM)
Summary: Great quality product, priced right. Cuts and installs easy-follow the instructions people!! PRO TIP-you don’t need to cover every square inch. OVERKILL!! Think about it-when a bell rings you could put your fingers on the edge and silence it right? Same rules apply here. A strip or square will isolate the vibration and notice when placed correctly— knock on the surface and see what vibrates or what part makes the loudest drowning and that’s a good clue of where you should put a piece of this…unless you’re trying to use it for temperature insulation no need to go ape on it. If you look at the bottom of a stainless steel sink, it’s got a stripe or a small sticker of insulation that keeps it from rattling. You can do that here. What’s important to note is the instruction specifically say use a roller to roll the ribs out until it’s smooth that way you’ve got maximum adhesion. I see a lot of pictures and videos from people that finished their install and didn’t follow this simple instruction. It makes sure that it’s stuck down before you put all your paneling and carpet back in and it’s a small step with a cheap wooden roller it’s easy. I’ll say the installation with this product is a breeze. You can use sharp scissors or a blade. It does get gummy after a while, and you may need to clean off your blade or your scissors, but it cuts very well and the ribs make it easy to size in space the thickness is fantastic and the backing paper comes off quite easily. I’ve done lots of installations with Graphics emblems you name it and this product is very easy to use and represents good value.
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Reviewed in the United States on March 30, 2026

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