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Antique Zircon and Diamond Necklace
12.25ct Zircon Necklace Front
2.70ct Diamond Necklace Detail
Zircon Diamond Necklace Close Up
Zircon Sapphire and Aquamarine Jewellery
Zircon Necklace Worn Image
Gemstone and Diamond Jewellery
Old European Diamond Detail
Round Faceted Zircon Detail
Collet Set Zircon Detail
Necklace Measurement Size Reference
IDGL Gemstone Report Card
Wearing Zircon Diamond Necklace
Zircon Necklace On Neck

Antique 12.25ct Zircon, 2.70ct Diamond and Platinum Chain Necklace – Circa 1920

A stunning, fine and impressive antique 12.25 carat blue zircon, 2.70 carat diamond and platinum necklace; part of our zircon jewellery collection

This stunning, fine and impressive zircon and diamond necklace has been crafted in platinum.

The fully articulated subtly graduating line necklace incorporates five impressive collet set round faceted cut zircons, totalling 12.25cts.

The central zircon setting incorporates a hinged loop attachment to the reverse, allowing for the addition of a suspended terminal if desired.

The gemstone links alternate with arrays of collet set Old European round cut diamonds and three pavé set eight cut diamonds in a linear pale.

The anterior necklace setting suspends from a pierced decorated long bar chain and secures to the reverse with a conventional spring-loaded bolt ring fastening.

This stunning gemstone necklace has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

This impressive necklace in platinum is supplied with an IDGL diamond and gemstone grading report card.

Such combination antique necklaces, set with stunning and very high graded diamonds and vibrant zircons, are rare to the market.

This exquisite antique zircon and diamond chain necklace makes a thoughtful gift for milestone birthdays, anniversaries, weddings, Mother’s Day or other special celebrations, offering both beauty and sentiment. Its authentic antique character, fine craftsmanship and timeless design also give it exceptional heirloom appeal.

This stunning antique necklace is exceptional quality, set with stunning zircons displaying fine colour, brilliance and presence.

The impressive high colour graded diamonds display a fine white colour and brilliance.

This blue zircon necklace is an exceptional gauge of platinum and is in exceptional condition.

Additional information

Zircon Quality

Colour Blue
Cut Round Faceted
Content 12.25 carats

Diamond Quality

Colour (average grades) H
Clarity (average grades) SI2
Cut Old European/Eight
Content 2.70 carats

Number of Diamonds
62

Dimensions

Length of setting 25.4cm/10"
Width of central setting 9.88mm/0.39"
Height of setting 5.81mm/0.23"
Wearing length 42.55cm/16.75"

Weight

18.64 grams

Gemstone

,

Metal

Platinum

Date

Circa 1920

Diamond Clarity:

SI2

Diamond Colour:

H

Can be Resized:

no

FREE INTERNATIONAL SHIPPING
Dispatched via DHL (or equivalent) on the next working day.

Estimated Delivery:

  • UK: 2–3 working days
  • Worldwide: 5–7 working days

Fully Insured in Transit
Free insurance up to £30,000. AC Silver remains responsible until delivery is confirmed.

Returns & Cancellations
You have 14 days to cancel your order.

Returns must be sent to our UK address within 14 days of cancellation.

Customers are responsible for return postage. A refund will be processed after inspection of the returned item.

Altered or Personalised Items

  • Items resized or altered before dispatch: exchange or credit note only
  • Engraved silver: non-refundable

Full returns & cancellation policy

What our customers say

5.0 ★★★★★ ★★★★★ based on 203 reviews
★★★★★ ★★★★★

I have dealt with AC silver on several occasions

I have dealt with AC silver on several occasions and always found Andrew extremely knowledgable and trustworthy. Nothing is too much trouble and I am absolutely delighted with my last purchase of a 5 stone diamond ring. From start to finish the process was extremely easy and everything catered for. It was a pleasure to del with Andrew and his most helpful and charming Assistant.
Kathryn 6 Sep 2026
★★★★★ ★★★★★

excellent communication and fast deliver…

excellent communication and fast delivery
oliver 10 Aug 2026
★★★★★ ★★★★★

Lovely selection & excellent service

AC Silver has a stunning selection of antique and vintage items. Both of my brooches arrived right on time as indicated by the tracking. They are even lovelier in person and I look forward to wearing them for decades to come. Andrew and Gemma provided excellent communication and prompt dispatch. I would absolutely recommend working through them.
Christina 15 Jul 2026
★★★★★ ★★★★★

Fabulous service, beautiful product.

Fabulous service, beautiful product.
Imogen 24 Jun 2026
★★★★★ ★★★★★

Beautiful collection and outstanding service

Beautiful collection and outstanding service. I already bought two extraordinary pieces and can only highly recommend.
Christine 23 Jun 2026
★★★★★ ★★★★★

Excellent customer care.

I had to place the order over the phone as my internet was misbehaving. The lady who I spoke to could not have been more helpful and was particularly careful to get all the details correct. I was then informed about the collection and dispatch of the item purchased, by email. The item arrived as expected and it had been most well packed so that no harm could come to it. It was a delight to purchase this item from C6323, AC Silver, and I could not fault any aspect of their customer care. I was highly delighted with my silver mustard pot and it was much better than the pictures on the web site.
Hilary 20 May 2026
★★★★★ ★★★★★

Exceptional personal service

First class personal service and attention to detail along with an exceptional quality of items offered for sale. A very smooth purchasing experience with swift and safe despatch of high value objects via courier. Highly recommended.
Colin 28 Apr 2026
★★★★★ ★★★★★

A lovely experience

AC Silver's website is very detailed and informative - allows customers to make well good comparisons and subsequent choices. The owner and his staff are very helpful and friendly - dealing with them is a pleasure. They go the extra mile to make sure that customers are totally satisfied with their purchases. Would highly recommend this store.
Wendy 27 Feb 2026
★★★★★ ★★★★★

Excellent experience

Excellent experience buying a beautiful item from AC Silver. Enquiries were dealt with quickly and courteously, I felt very confident buying an expensive item online. It arrived quickly and safely, beautifully packaged. I am delighted with it and wouldn't hesitate to recommend AC Silver.
Susan 24 Jan 2026
★★★★★ ★★★★★

This was an all-around great experience. The pre-sale communication was excellent and informative. The team was extremely responsive. When the item arrived, it was exactly as described.

This was an all-around great experience. The pre-sale communication was excellent and informative. The team was extremely responsive. When the item arrived, it was exactly as described. I would recommend these guys to anyone.
26 Dec 2025
★★★★★ ★★★★★

Amazing response and flexibility

Andrew was amazing to work with, as I'm purchasing overseas, to help me navigate all the different options. He was patient, super responsive, and knowledgeable. I received the ring now, and it's a beautiful piece! Thank you so much Andrew!
19 Dec 2025
★★★★★ ★★★★★

Excellent Service

Excellent communication from Andrew at AC Silver. This was the third time I purchased from AC Silver. The videos, photographs and descriptions are always detailed and accurately show the items being bought. Delivery is always prompt and the silverware arrives professionally package with top quality storage bags included! Thank you to everyone one at AC Silver.
Jeremy 24 Nov 2025

Frequently Asked Questions

  • Yes. This necklace dates to circa 1920 and has been crafted in platinum. Its articulated construction, Old European cut diamonds and period design give it the distinctive character expected of fine early 20th-century jewellery.

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Original Price:
£14,950

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