Art Deco Diamond Clip Brooch Marquise Brilliant-cut Diamond of 9.66 Carats, Round Diamonds, Platinum and 18K Gold
At a glance
Shape
Marquise, Round Brilliant
Carat
9.66ct
Colour
On Request
Clarity
On Request
Metal
18K Platinum
A marquise brilliant-cut diamond weighing 9.66 carats anchors this clip brooch, its elongated point-to-point silhouette surrounded by round diamonds in a composition mounted across platinum and 18k gold. Marquise cutting maximises the visual size of a diamond relative to its actual carat weight more than almost any other shape, meaning a 9.66-carat marquise stone reads with a scale on the lapel considerably greater than a round or cushion diamond of the same weight would achieve — a cutting decision that speaks to a jeweller's understanding of how the finished piece would actually be worn and seen.
Colour grade and clarity for the centre stone are available on request. What can be confirmed with confidence is the marquise brilliant cut and 9.66-carat weight, verified directly against the physical piece, along with the two-metal construction — platinum almost certainly securing the centre stone and the most structurally demanding settings, with 18k gold contributing warmth and structure to the surrounding framework. This dual-metal approach, using each material specifically where it performs best, is characteristic of serious Art Deco workshop practice rather than a cost-driven compromise.
As a wearable piece, a brooch built around a marquise diamond approaching ten carats becomes the unmistakable focal point of any outfit it joins — pinned to a lapel, its elongated form draws the eye along its length in a way a rounder stone could not replicate, commanding attention through shape as much as size. Marquise diamonds of this scale rarely appear on the market in clean, well-proportioned examples, since the shape's pointed ends are particularly vulnerable during both cutting and subsequent wear, making a well-preserved example like this a genuinely considered acquisition.
Our workshop has inspected the clip mechanism and centre-stone setting given the scale and value concentrated in this piece, recommending periodic professional inspection for any brooch carrying this level of central stone weight. Independent gemmological certification for the 9.66-carat marquise diamond is available on request, documentation we consider essential for a stone of this scale and one we encourage every serious buyer to review in full. Because marquise-cut diamonds of this scale are genuinely difficult to source clean and well-proportioned, a brooch built specifically to showcase one represents the kind of considered, centre-stone-first design that distinguishes serious period jewellery from more conventional contemporary settings.
This brooch is signed into the Legacy collection as a substantial marquise diamond design, chosen specifically to let the centre stone's elongated form lead. Contact our client advisory team to request the full report or arrange a private viewing this week.
Specifications
- Metal: 18K Platinum
- Form: Clip-Brooch
- Diamond / Gem weight: 9.66ct
- Cut / Shape: Round Brilliant, Marquise
- Carat Weight
- 9.66ct
- Shape
- Marquise, Round Brilliant
- Color
- On Request
- Clarity
- On Request
- Metal
- 18K Platinum
- Certification
- GIA / IGI / HRD on request
- Treatment
- None · Natural
- Reference Number
- LD-BR-0036
Brink's Global insured worldwide delivery — every Legacy acquisition ships door-to-door through Brink's secure network, fully insured, in discreet neutral packaging.
White-glove delivery — for qualifying pieces, our concierge arranges in-person delivery to your residence or private office.
3-day exclusive hold — your reservation holds the piece privately for 3 days, fully refundable.
Independently certified — to your choice of GIA, IGI or HRD on request; documents shared privately with verified acquirers.
Authentication guarantee — if any piece does not match its stated specifications, full money-back refund.
Care — a soak in warm water with mild soap restores light return; have the prongs inspected annually.
In full — nothing hidden
Most listings hide the writing. We don't — this is the work, in full.
A marquise brilliant-cut diamond weighing 9.66 carats anchors this clip brooch, its elongated point-to-point silhouette surrounded by round diamonds in a composition mounted across platinum and 18k gold. Marquise cutting maximises the visual size of a diamond relative to its actual carat weight more than almost any other shape, meaning a 9.66-carat marquise stone reads with a scale on the lapel considerably greater than a round or cushion diamond of the same weight would achieve — a cutting decision that speaks to a jeweller's understanding of how the finished piece would actually be worn and seen.
Colour grade and clarity for the centre stone are available on request. What can be confirmed with confidence is the marquise brilliant cut and 9.66-carat weight, verified directly against the physical piece, along with the two-metal construction — platinum almost certainly securing the centre stone and the most structurally demanding settings, with 18k gold contributing warmth and structure to the surrounding framework. This dual-metal approach, using each material specifically where it performs best, is characteristic of serious Art Deco workshop practice rather than a cost-driven compromise.
As a wearable piece, a brooch built around a marquise diamond approaching ten carats becomes the unmistakable focal point of any outfit it joins — pinned to a lapel, its elongated form draws the eye along its length in a way a rounder stone could not replicate, commanding attention through shape as much as size. Marquise diamonds of this scale rarely appear on the market in clean, well-proportioned examples, since the shape's pointed ends are particularly vulnerable during both cutting and subsequent wear, making a well-preserved example like this a genuinely considered acquisition.
Our workshop has inspected the clip mechanism and centre-stone setting given the scale and value concentrated in this piece, recommending periodic professional inspection for any brooch carrying this level of central stone weight. Independent gemmological certification for the 9.66-carat marquise diamond is available on request, documentation we consider essential for a stone of this scale and one we encourage every serious buyer to review in full. Because marquise-cut diamonds of this scale are genuinely difficult to source clean and well-proportioned, a brooch built specifically to showcase one represents the kind of considered, centre-stone-first design that distinguishes serious period jewellery from more conventional contemporary settings.
This brooch is signed into the Legacy collection as a substantial marquise diamond design, chosen specifically to let the centre stone's elongated form lead. Contact our client advisory team to request the full report or arrange a private viewing this week.
Specifications
- Metal: 18K Platinum
- Form: Clip-Brooch
- Diamond / Gem weight: 9.66ct
- Cut / Shape: Round Brilliant, Marquise
Eleanor Whitmore
- 1 EXPLORE Browse the collection
- 2 EXPRESS INTEREST Wishlist · Offer · Chat
- 3 PRIVATE GALLERY Your Private Viewing Room
- 4 RESERVE 3-day exclusive hold
- 5 DELIVERED Brinks · White-glove
Get a private alert when new arrivals match Brooches. Sent only when our specialists source a piece worth your attention. No newsletter.
Receive a private catalogue, curated for you
Enter your email to receive personally-selected pieces matching your interests — curated by your dedicated specialist, sent privately, never published. No newsletter, no marketing.
