What defines Art Deco jewellery from the 1930s?

Art Deco jewellery from the 1930s often blends clean geometric forms with softer fluid or foliate elements, marking a transition towards the Retro era. Platinum settings and high-grade coloured gemstones were frequently combined with sparkling diamonds to create bold, light-reflecting structural designs.

What materials were traditionally used to make brooches in this era?

High-end 1930s brooches were predominantly crafted using platinum or white gold to provide a strength-to-weight ratio that allowed for intricate wirework and secure claw settings. High-clarity diamonds and natural coloured gemstones like sapphires, rubies, and emeralds were central features.

How can you identify authentic platinum jewellery from the 1930s?

Authentic period pieces usually exhibit specific hallmarks indicating metal purity, maker marks, or national assay stamps. Additionally, hand-cut gemstones, fine millgrain edges, geometric pierced lattice work, and specialized pin closures like safety catches are characteristic of the decade.

How can an antique brooch be worn in contemporary fashion?

An antique brooch can be styled as a lapel accent on a tailored blazer, fastened at the neckline of a collared shirt, or used to secure a silk scarf. It can also be pinned to a velvet ribbon to wear as a choker necklace or attached to a handbag for a touch of classic ornamentation.

How should yellow sapphire and platinum jewellery be cleaned and maintained?

Clean platinum and sapphire jewellery using warm water, mild dish soap, and a soft-bristled brush to remove dust and oil from beneath the stone settings. Store the piece individually in a lined box or soft pouch to prevent diamonds from scratching other items.

for sale €4,622 $5,017

£3,950

AC Silver

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Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

Name: Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935
Brand: Antique
SKU: SA1180107
Price: 3950 GBP
Availability: InStock

1920 - 1940

For Sale by AC Silver

Description

A stunning, fine and impressive antique Art Deco Swedish 3.18 carat yellow sapphire, 2.40 carat diamond and platinum brooch; part of our diverse collection of sapphire brooches.

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

The antique brooch features an impressive central four-claw set 3.18ct cushion cut yellow sapphire.

The sapphire is flanked to either side with a symmetrical Art Deco array of scroll and foliate settings, ornamented with seventy-two impressive diamonds, in a combination of pear, transitional modern brilliant round and eight cuts.

This antique yellow sapphire brooch secures to the reverse with a hinged pin and sheath style fastening.

The brooch is hallmarked to the reverse with the Swedish Three Crowns National mark and the maker's mark (WAB); the piece has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

This impressive finely crafted yellow sapphire brooch is supplied with an IDGL diamond and gemstone grading report card.

This antique yellow sapphire brooch with diamonds makes an exceptional gift for birthdays, anniversaries or retirement celebrations. The yellow sapphire, symbolising wisdom, joy, and success, provides a beautiful blend of colour and offers a meaningful way to honour personal achievements, while its timeless design brings classic antique elegance to any jewellery collection.

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.

Condition

This stunning brooch is superior quality, set with an impressive feature sapphire displaying fine colour, brilliance and presence.

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

This antique sapphire and diamond brooch is an superior gauge of platinum and is in exceptional condition, with very clear hallmarks to the reverse; the hallmarks are struck deeply due to the superior gauge of platinum.

Reflections in photographs may detract from the true representation of this fine sapphire and diamond brooch.

Sapphire Quality

Colour Yellow

Cut Cushion

Content 3.18 carats

Dimensions 10.60mm (length) x 7.90mm (width) x 3.86mm (depth)

Diamond Quality

Colour (average grades) H

Clarity (average grades) SI2

Cut Pear/Transitional Modern Brilliant Round/Eight

Content 2.40 carats

Number of Diamonds

72

Dimensions

Length of setting 4.85cm/1.91'

Width of setting 1.48cm/0.58'

Across pin 3.25cm/1.28'

Height of setting 6.27mm/0.25'

Weight

11.62 grams

Date: Circa 1935

Origin: Sweden, Europe

A video is available upon request.

Physical Dimensions

Height

0.6cm (0.24")

Width

1.5cm (0.59")

Depth

4.8cm (1.89")

Declaration

AC Silver has dated this Yellow Sapphire Diamond Brooch to the 1930s.

Reference Numbers

Sellingantiques Reference

SA1180107

Dealers Internal Reference

C9511

Dealers Notes

PLEASE NOTE: AC Silver takes pride in offering only quality items for sale.

This pride in quality includes the professional, efficient and personal service extended to all AC Silver customers.

All items purchased usually dispatched within 24 hours following cleared payment.

All items are professionally and securely packaged, sent FREE of charge and are FULLY INSURED during transit.

FREE worldwide international deliveries are via FedEx International Priority Service.

AC Silver is pleased to provide a 30-day money back guarantee.

Description

A stunning, fine and impressive antique Art Deco Swedish 3.18 carat yellow sapphire, 2.40 carat diamond and platinum brooch; part of our diverse collection of sapphire brooches.

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

fig 1. An Art Deco platinum brooch centered with an oval cushion-cut yellow sapphire enclosed by diamond-set scrollwork and foliate motifs. — fig 1. Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

The antique brooch features an impressive central four-claw set 3.18ct cushion cut yellow sapphire.

The sapphire is flanked to either side with a symmetrical Art Deco array of scroll and foliate settings, ornamented with seventy-two impressive diamonds, in a combination of pear, transitional modern brilliant round and eight cuts.

“

This antique yellow sapphire brooch secures to the reverse with a hinged pin and sheath style fastening.

AC Silver

fig 2. An Art Deco platinum brooch centered with an oval cushion-cut yellow sapphire enclosed by diamond-set scrollwork and foliate motifs. — fig 2. Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

The brooch is hallmarked to the reverse with the Swedish Three Crowns National mark and the maker's mark (WAB); the piece has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.

fig 3. An Art Deco platinum brooch centered with an oval cushion-cut yellow sapphire enclosed by diamond-set scrollwork and foliate motifs. — fig 3. Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

This impressive finely crafted yellow sapphire brooch is supplied with an IDGL diamond and gemstone grading report card.

This antique yellow sapphire brooch with diamonds makes an exceptional gift for birthdays, anniversaries or retirement celebrations. The yellow sapphire, symbolising wisdom, joy, and success, provides a beautiful blend of colour and offers a meaningful way to honour personal achievements, while its timeless design brings classic antique elegance to any jewellery collection.

fig 4. An Art Deco platinum brooch centered with an oval cushion-cut yellow sapphire enclosed by diamond-set scrollwork and foliate motifs. — fig 4. Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

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.

Condition

This stunning brooch is superior quality, set with an impressive feature sapphire displaying fine colour, brilliance and presence.

fig 5. An Art Deco platinum brooch centered with an oval cushion-cut yellow sapphire enclosed by diamond-set scrollwork and foliate motifs. — fig 5. Antique Swedish 3.18ct Yellow Sapphire and 2.40ct Diamond and Platinum Brooch Circa 1935

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

This antique sapphire and diamond brooch is an superior gauge of platinum and is in exceptional condition, with very clear hallmarks to the reverse; the hallmarks are struck deeply due to the superior gauge of platinum.