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Brooch Square-shaped Emerald of 37.00 Carats, Marquise-shaped Diamonds, Platinum and 18K Yellow Gold

$75,000
In stock · one of a kind · ready to ship
Insured worldwide delivery via Brink's Global Services — shipping & delivery
Certification on request before purchase — returns policy
Reserve — $7,500 deposit
3-Day Exclusive Hold · Fully Refundable
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At a glance

Shape

Emerald Cut, Marquise

Carat

37ct

Colour

On Request

Clarity

On Request

Metal

18K Yellow Gold Platinum

CertificateCertified · papers on request
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ITEMS SIMILAR TOEmerald Cut, Marquise emerald brooches
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A 37.00 carat emerald is not a stone most collectors will ever hold in person, let alone acquire — it places this brooch firmly among the rarest pieces a private house can offer, the kind of gem-led jewel that exists more as an event in a collection than a routine addition to it. The square-shaped emerald sits at the centre of a design built in both platinum and 18k yellow gold, surrounded by marquise-shaped diamonds whose elongated points draw the eye outward from the stone's saturated green, a classic pairing of cut and colour that lets each element reinforce the other in turn.

The 37.00 carat weight is confirmed directly from the piece's own documentation, as is the dual-metal construction of platinum and 18k yellow gold — a combination period and revival jewellers used deliberately, letting platinum's cool white tone frame the emerald precisely while yellow gold added warmth to the overall structure of the piece. Clarity and colour grading for the emerald, along with total diamond carat weight, remain on request pending further verification; a stone of this size deserves a formal gemological report rather than an estimate, and one is prepared for any serious enquiry that follows. Emeralds of this magnitude are exceptionally rare to encounter with the clarity required for a clean square cut, since larger rough is disproportionately more likely to carry visible inclusions that limit faceting options considerably.

A piece of this scale is, by its nature, worn rarely and deliberately — the centrepiece of a black-tie evening, a gala lapel, or the sole ornament on a formal gown where nothing else competes for attention on the body. Its dual-metal construction also gives it unusual versatility for a stone this size, sitting comfortably against both warm and cool-toned jewellery already in a client's collection. Stones of this scale essentially never return to the open market once placed with a serious collector, which is part of what makes an acquisition like this a genuine store of value as much as an object of beauty in its own right.

Every gemstone offered through Legacy undergoes rigorous internal review, and independent certification is arranged on request, particularly for a stone of this significance. Given its scale, we manage this acquisition with the utmost discretion, from first enquiry through delivery. This brooch is recorded in the Legacy register as LD-BR-0062. We welcome a private conversation with serious collectors to discuss the full report and arrange a viewing.

Specifications

  • Metal: 18K Yellow Gold Platinum
  • Diamond / Gem weight: 37ct
  • Cut / Shape: Emerald Cut, Marquise
  • Gemstones: Emerald
Carat Weight
37ct
Shape
Emerald Cut, Marquise
Color
On Request
Clarity
On Request
Metal
18K Yellow Gold Platinum
Certification
GIA / IGI / HRD on request
Treatment
None · Natural
Reference Number
LD-BR-0062

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.

The Complete Story

In full — nothing hidden

Most listings hide the writing. We don't — this is the work, in full.

A 37.00 carat emerald is not a stone most collectors will ever hold in person, let alone acquire — it places this brooch firmly among the rarest pieces a private house can offer, the kind of gem-led jewel that exists more as an event in a collection than a routine addition to it. The square-shaped emerald sits at the centre of a design built in both platinum and 18k yellow gold, surrounded by marquise-shaped diamonds whose elongated points draw the eye outward from the stone's saturated green, a classic pairing of cut and colour that lets each element reinforce the other in turn.

The 37.00 carat weight is confirmed directly from the piece's own documentation, as is the dual-metal construction of platinum and 18k yellow gold — a combination period and revival jewellers used deliberately, letting platinum's cool white tone frame the emerald precisely while yellow gold added warmth to the overall structure of the piece. Clarity and colour grading for the emerald, along with total diamond carat weight, remain on request pending further verification; a stone of this size deserves a formal gemological report rather than an estimate, and one is prepared for any serious enquiry that follows. Emeralds of this magnitude are exceptionally rare to encounter with the clarity required for a clean square cut, since larger rough is disproportionately more likely to carry visible inclusions that limit faceting options considerably.

A piece of this scale is, by its nature, worn rarely and deliberately — the centrepiece of a black-tie evening, a gala lapel, or the sole ornament on a formal gown where nothing else competes for attention on the body. Its dual-metal construction also gives it unusual versatility for a stone this size, sitting comfortably against both warm and cool-toned jewellery already in a client's collection. Stones of this scale essentially never return to the open market once placed with a serious collector, which is part of what makes an acquisition like this a genuine store of value as much as an object of beauty in its own right.

Every gemstone offered through Legacy undergoes rigorous internal review, and independent certification is arranged on request, particularly for a stone of this significance. Given its scale, we manage this acquisition with the utmost discretion, from first enquiry through delivery. This brooch is recorded in the Legacy register as LD-BR-0062. We welcome a private conversation with serious collectors to discuss the full report and arrange a viewing.

Specifications

  • Metal: 18K Yellow Gold Platinum
  • Diamond / Gem weight: 37ct
  • Cut / Shape: Emerald Cut, Marquise
  • Gemstones: Emerald
MEET YOUR PRIVATE CLIENT ADVISOR

Annabelle Marchetti

Fancy Colour Diamond Specialist
Recognized Legacy Source
GIA / IGI / HRD Verified
Brinks Insured Partner
Based in New York
Always available — by WhatsApp and email
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Brooch Square-shaped Emerald of 37.00 Carats,… $7,500
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In stock · one of a kind · ready to ship
Insured worldwide delivery via Brink's Global Services — shipping & delivery
Certification on request before purchase — returns policy

At a glance

Shape

Emerald Cut, Marquise

Carat

37ct

Colour

On Request

Clarity

On Request

Metal

18K Yellow Gold Platinum

CertificateCertified · papers on request

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