4.65ct Diamond and Platinum Plaque Brooch - Antique Circa 1930

GBP 5,450.00

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Object Description

A stunning, fine and impressive antique 4.65 carat diamond and platinum plaque brooch; part of our diverse antique jewellery and estate jewelry collections.

This stunning, fine and impressive antique diamond brooch has been crafted in platinum.

The pierced decorated, elliptical platinum frame is ornamented with a central feature collet set 0.68ct Old European round cut diamond.

The principle stone is surrounded with eight petal-shaped motifs embellished with a total of thirty-two Old European cut supporting diamonds, creating a floral motif to the centre of the design.

The central floral motif is encompassed with the outer elliptical frame, which features a further sixty-four Old European round cut pavé set diamonds.

The upper and lower portions of the impressive pierced decorated frame are each ornamented with a curvilinear encasing motif, adding further depth to the stunning design.

The impressive design secures to the reverse with a hinged pin and sheath style fastening.

This antique diamond plaque brooch has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

This impressive antique diamond brooch is supplied with an independent diamond grading report certificate for the feature stone, in addition to an independent diamond grading report card for the supporting stones.

Images do not always reflect the true colour and brilliance of gemstones and diamonds. The video however provides a truer representation of the actual colour and showcases each stone.

Diamond Quality
Feature Diamond
Colour J
Clarity SI1
Cut Old European
Content 0.68 carat
Dimensions 5.26mm x 4.92mm x 3.64mm

Supporting Diamonds
Colour (average grades) G/H/I
Clarity (average grades) VS2/SI2
Cut Old European
Content 3.97 carats

Total Diamond Content
4.65 carats

Length of setting 3.1cm/1.22″
Width of setting 6.7cm/2.64″
Across pin 6.2cm/2.44″
Height of setting 4.24mm/0.17″

13.25 grams

Object History

Date: Circa 1930

Object Literature


FREE OF CHARGE to all customers – including national and international deliveries.

Dispatch is either the same or next working day once a payment is received.


Insurance cover is provided FREE OF CHARGE for items up to the value of £30,000.

All items are fully insured and sent at the risk of AC Silver.

Complimentary insurance valuation with images and text is provided with your purchase.

Object Condition

This stunning antique diamond plaque brooch is exceptional quality, set with a stunning feature diamond displaying a fine white colour, brilliance and presence.

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

The brooch is an exceptional gauge of platinum and is in excellent condition.

Reflections in photographs may detract from the true representation of this fine example of diamond jewellery/estate jewelry.

Object Details

Dealer Opening Times

We are open weekly as follows:

10 - 5
10 - 5
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10 - 5

Dealer Contact

+44 (0)191 240 2645
+44 (0)7836 286218

Dealer Location

35b St Georges Terrace
Tyne and Wear

Tel: +44 (0) 191 240 2645

Fax: +44 (0) 191 240 2647

VAT: GB 500 0310 42

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