What characterises Art Deco jewellery from the 1930s?

Art Deco jewellery from the 1930s is defined by bold geometric patterns, symmetrical designs, and fine gemstone settings. Platinum became the primary metal during this period due to its structural strength, allowing for delicate openwork and intricate millegrain detailing.

What materials were commonly used in Art Deco brooches?

Art Deco brooches typically feature high-purity platinum paired with diamonds and vibrant coloured gemstones such as emeralds, sapphires, and rubies. Craftsmen frequently used millegrain edging, geometric openwork, and calibre-cut gemstones.

How do you identify authentic 1930s Art Deco jewellery?

Authentic 1930s Art Deco jewellery displays hand-engraved millegrain detailing, precise pierced lattice work, and platinum or gold hallmarks. The presence of geometric symmetry and hand-cut stones consistent with early twentieth-century manufacturing techniques helps verify authenticity.

How can an antique emerald brooch be styled today?

An antique emerald brooch can be styled on lapels, coats, or evening dresses, or pinned into a silk scarf or hairpiece. When not being worn, it can also be displayed inside a glass shadow box frame as a decorative object.

How should platinum, emerald, and diamond jewellery be cleaned and preserved?

Clean platinum and diamond jewellery gently using warm water, mild soap, and a soft-bristled brush. Ultrasonic cleaners and harsh chemicals should be avoided on emeralds due to potential natural internal features, and pieces should be stored individually in soft pouches.

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1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

Name: 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930
Brand: Antique
SKU: SA1237914
Price: 8950 GBP
Availability: InStock

1920 - 1940

For Sale by AC Silver

Description

A stunning, fine and impressive 1.40 carat emerald and 6.20 carat diamond and platinum brooch; part of our authentic antique Art Deco jewellery/jewelry collection.

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

The pierced decorated Art Deco frame features three impressive graduating octagonal cut Colombian emeralds, individually collet set in a horizontal trilogy arrangement.

The central geometric-shaped setting is further embellished with fifty-four pavé set Old European cut diamonds.

The brooch terminates to either end with a stunning feature 0.71ct and 0.64 Old European round cut diamond, completing the design.

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

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

This impressive brooch is supplied with two IDGL diamond grading report certificates for the feature stones, in addition to an IDGL diamond grading report card for the supporting stones and an emerald report card and certificate supplied by the Gemmological Certification Services, London*.

This stunning Art Deco brooch is the finest of its type you could hope to acquire.

This platinum emerald and diamond Art Deco brooch is a distinguished gift for celebrating life's most memorable milestones with elegance and sophistication. Crafted in luxurious platinum, prized for its rarity, durability, and naturally radiant finish, this exquisite piece is ideal for milestone birthdays, anniversaries, weddings, Mother's Day or significant personal achievements. Its authentic Art Deco provenance, exceptional craftsmanship, and timeless design give it outstanding appeal.

NOTE: * This documentation accredits the emerald originating in Colombia (Colombian) and certifies that the gemstone shows minor to moderate amount of oil in fissures.

'Rather than regarding inclusions in coloured stones as harmful, in small sizes and numbers that do not in any way detract from their beauty, they should be regarded as adding to desirability, for they provide identifying characteristics.'

Reference: The Connoisseur's Guide to Precious Gemstones, R. Wise, Brunswick House Press.

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 original 1930s Art Deco brooch is exceptional quality, set with stunning emeralds displaying fine colour, brilliance and presence.

The high clarity graded feature diamonds display a fine white colour, brilliance and presence.

The very well colour matched supporting diamonds display a fine white colour and brilliance; whilst multi-diamond brooches from this period are often set with diamonds graded at P1 clarity, the present stones have been carefully selected and evenly matched, displaying a fine white colour and pleasing brilliance.

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

Reflections in photographs may detract from the true representation of this stunning diamond and emerald brooch in platinum.

Emerald Quality

Origin Colombia

Cut Octagonal

Content 1.40 carats

Diamond Quality

Feature Diamond One

Colour J

Clarity VVS2

Cut Old European

Content 0.71 carat

Dimensions 5.38mm (length) x 5.40mm (width) x 3.88mm (depth)

Feature Diamond Two

Colour H

Clarity VS2

Cut Old European

Content 0.64 carat

Dimensions 5.35mm (length) x 5.06mm (width) x 3.76mm (depth)

Supporting Diamonds

Colour (average grades) I

Clarity (average grades) P1

Cut Old European

Content 4.85 carats

Total Diamond Content

6.20 carats

Number of Diamonds

56

Dimensions

Length of setting 5.9cm/2.32'

Width of setting 2.25cm/0.89'

Across pin 3.7cm/1.46'

Height of setting 4.63mm/0.18'

Weight

10.99 grams

Date: Circa 1930

SKU: C9903

Physical Dimensions

Height

0.463cm (0.18")

Width

2.25cm (0.89")

Depth

5.9cm (2.32")

Declaration

AC Silver has dated this Art Deco Emerald Brooch to the 1930s.

Reference Numbers

Sellingantiques Reference

SA1237914

Dealers Internal Reference

C9903

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 1.40 carat emerald and 6.

“

20 carat diamond and platinum brooch; part of our authentic antique Art Deco jewellery/jewelry collection.

AC Silver

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

fig 1. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 1. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

The pierced decorated Art Deco frame features three impressive graduating octagonal cut Colombian emeralds, individually collet set in a horizontal trilogy arrangement.

The central geometric-shaped setting is further embellished with fifty-four pavé set Old European cut diamonds.

fig 2. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 2. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

The brooch terminates to either end with a stunning feature 0.71ct and 0.64 Old European round cut diamond, completing the design.

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

fig 3. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 3. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

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

This impressive brooch is supplied with two IDGL diamond grading report certificates for the feature stones, in addition to an IDGL diamond grading report card for the supporting stones and an emerald report card and certificate supplied by the Gemmological Certification Services, London*.

fig 4. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 4. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

This stunning Art Deco brooch is the finest of its type you could hope to acquire.

This platinum emerald and diamond Art Deco brooch is a distinguished gift for celebrating life's most memorable milestones with elegance and sophistication. Crafted in luxurious platinum, prized for its rarity, durability, and naturally radiant finish, this exquisite piece is ideal for milestone birthdays, anniversaries, weddings, Mother's Day or significant personal achievements. Its authentic Art Deco provenance, exceptional craftsmanship, and timeless design give it outstanding appeal.

fig 5. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 5. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

NOTE: * This documentation accredits the emerald originating in Colombia (Colombian) and certifies that the gemstone shows minor to moderate amount of oil in fissures.

'Rather than regarding inclusions in coloured stones as harmful, in small sizes and numbers that do not in any way detract from their beauty, they should be regarded as adding to desirability, for they provide identifying characteristics.'

fig 6. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 6. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

Reference: The Connoisseur's Guide to Precious Gemstones, R. Wise, Brunswick House Press.

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.

fig 7. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 7. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

Condition

This original 1930s Art Deco brooch is exceptional quality, set with stunning emeralds displaying fine colour, brilliance and presence.

The high clarity graded feature diamonds display a fine white colour, brilliance and presence.

fig 8. An Art Deco platinum brooch featuring three central step-cut green emeralds surrounded by a geometric lattice of diamonds with millegrain borders. — fig 8. 1.40ct Emerald and 6.20ct Diamond, Platinum Brooch - Art Deco - Antique Circa 1930

The very well colour matched supporting diamonds display a fine white colour and brilliance; whilst multi-diamond brooches from this period are often set with diamonds graded at P1 clarity, the present stones have been carefully selected and evenly matched, displaying a fine white colour and pleasing brilliance.