Antique Platinum 1.70ct Black Onyx and 2.20ct Diamond Cartier Brooch
A stunning and impressive antique 1.70 carat black onyx and 2.20 carat diamond Cartier brooch in platinum – boxed; part of our Cartier jewellery collections
£5,950
This stunning original antique brooch has been crafted in platinum.
The pierced decorated, navette-shaped Art Deco style design displays an impressive paralleling array of twenty-eight channel set rectangular cut onyxes, totalling 1.70cts.
The black onyx formation is flanked with one hundred and twenty-eight pavé set Dutch cut diamonds, completing the design.
The brooch secures to the reverse with a hinged pin and safety clasp.
This 1920s antique brooch is hallmarked to the pin with the maker’s mark ‘Cartier’ and has been independently tested using state of the art technology (Niton XL2 Analyzer) and verified as platinum.
This stunning 1920’s brooch is supplied with an IDGL diamond and gemstone grading report card.
This stunning Cartier black onyx and diamond brooch is fitted to the original hinged leatherette presentation box, with a satin and velvet lined interior, securing with a push fit catch.
The interior of the cover bears the retailer’s mark ‘Wartski, 33 Mostyn Street, Llandudno’.
Such original examples are becoming increasingly difficult to locate.
An onyx and diamond brooch of this calibre is an extraordinary acquisition, ideal for collectors of signed jewellery or those seeking a rare and important Art Deco piece. It makes a remarkable gift for milestone occasions or significant celebrations, particularly for someone who appreciates iconic design and heritage craftsmanship. Bold, sophisticated and increasingly difficult to source, this Cartier brooch is both a statement accessory and a true heirloom treasure.
This stunning original antique brooch is exceptional quality, set with impressive onyxes displaying fine colour.
The impressive high colour graded diamonds display a fine white colour and brilliance.
The original presentation box has sympathetic wear in keeping with age.
The brooch is in exceptional condition and an excellent gauge of gold.
Additional information
| Onyx Quality | Cut Rectangular Cut |
|---|---|
| Diamond Quality | Colour (average grades) G Number of Diamonds |
| Dimensions | Length of setting 4.95cm/1.95" |
| Weight | 5.51 grams |
| Gemstone | |
| Metal | Platinum |
| Maker | Cartier |
| Date | Circa 1925 |
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
