4.05 ct Diamond and 4.20 ct Sapphire, Platinum Brooch - Art Deco Style - Vintage and Antique


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Object Description

A stunning, fine and impressive vintage (circa 1970) 4.05 carat blue sapphire and 4.05 carat antique (circa 1910) diamond, platinum brooch in the Art Deco style; part of our diverse vintage jewellery and estate jewelry collections.

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

The pierced decorated Art Deco style octagonal design is embellished with thirty-two antique (circa 1910) pavé set Old European round cut diamonds.

The intricate millegrain decorated geometric design features a central collet set sapphire cabochon.

The central sapphire is flanked on either side by four French cut sapphires and dour feature Old European round cut diamonds, collet set alternately in a horizontal fashion to the centre of the design.

A further twelve French cut channel set sapphires ornament the four cut-corners of the octagonal brooch to complete the design.

The brooch secures to the reverse with a hinged pin and safety clasp fastening.

This impressive vintage 1970’s brooch has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

The brooch is supplied with two independent diamond grading certificates for the larger feature diamonds, in addition to an independent diamond grading report card for the supporting diamonds and sapphires.

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
Diamond One

Colour I

Clarity VS1

Cut Old European round

Content 0.70 carat

Dimensions 5.50mm x 5.48mm x 3.29mm

Diamond One

Colour K

Clarity P1

Cut Old European round

Content 0.75 carat

Dimensions 5.61mm x 5.56mm x 3.36mm

Supporting Diamonds

Colour (average grades) H

Clarity (average grades) SI3

Cut Old European round

Content (total) 2.60 carats

Total Diamond Content

4.05 carats

Sapphire Quality
Colour Blue

Cut French / Cabochon

Content (total) 4.20 carats

Length of setting 2.7cm/1.06″

Width of setting 5.2cm/2.04″

Height of setting 6mm/0.23″

Object History

Date: Setting and Sapphires Circa 1970 / Diamonds Circa 1910

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 vintage Art Deco style brooch is fine quality set with vintage sapphires and high colour graded, old cut antique diamonds.

The brooch is a very good gauge of platinum and is in excellent condition.

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

Object Details

  • material
  • period
  • year
    Sapphires Circa 1970 / Diamonds Circa 1910

Dealer Opening Times

We are open weekly as follows:

10 - 5
10 - 5
10 - 5
10 - 5
10 - 5
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