Antique Platinum, Sapphire and Diamond Lozenge Brooch


  • Exquisite Antique Sapphire & Diamond Lozenge Brooch
  • Sapphire: Natural Untreated 1.36ct Oval Mixed Cut
  • Diamond: Approx 3.5ct Old Mine Cut
  • Size: 5.5cm x 2.5cm
  • Weight: 9.8 grams
  • Metal: Platinum
  • Hallmarked: No, but tested by us.
  • Age: 1901-1930

We are members of the British Jewellers Association and we are an Assay Assured Retailer.

We have excellent online reviews, averaging 4.9/5 on Feefo.

We only sell fine gold or sterling silver jewellery, crafted to high standards of quality. All gold items weighing over 1 gram will be hallmarked, as will all silver items over 7.78 grams. We do not sell plated jewellery.

Vintage items made before 1973 may not carry hallmarks but all precious metals and gemstones are carefully tested.

We offer FREE delivery and returns for UK customers via Royal Mail.

UK customers can upgrade to next working day delivery (if ordering by 2pm) for a small additional charge.

You can return your as new and unworn jewellery within 30 days for a full refund, unless it’s been personalised or made to order.

For items purchased from 1st November onward, the return period is extended to 15th January to allow for Christmas gifting.

In stock

What an absolutely glorious sight this brooch is to behold!

Dating, we believe, from the first 20 years of the 20th century, and fashioned entirely from platinum. The invention in 1901 of a torch that burned hot enough to melt platinum quickly was a revelation to jewellery making, and took us away from the heavy gold and silver settings of the Victorian era and into the delicate, intricate metal work of the Edwardian and Art Deco periods.

This brooch is a fabulous showcase of what can be achieved with that torch and a master craftsman of the time. It is just stunning. Every detail of this brooch is exquisite and it is a delight to hold, let alone wear!

We have painstakingly measured all of the old cut and eight cut diamonds in this piece and can put a conservative weight estimate of 3.5cts. The fabulous centrepiece cornflower blue sapphire weighs approximately 1.4ct and exhibits beautiful natural colour zoning under loupe examination with no other inclusions present – it’s a delightfully clear stone with only minor nibbles to the facet edges.

Because the central sapphire is so beautiful, we have had it laboratory tested which confirms it is an untreated sapphire (most unusual – 95% of sapphires are heated to improve appearance) and also that its origin is Sri Lanka (Ceylon) or Madagascar. Given the brooch’s likely age, we would put an educated guess on the stone’s origin being Sri Lanka.

Platinum is a dense and sturdy metal and this brooch weighs 9.8 grams in total and measures 5.5cm x 2.5cm in size. Reasonably discreet yet totally eye-catching at the same time.

Antique pieces like this don’t come along very often and we thrilled to showcase it in our shop. Whoever buys it will absolutely adore it we are sure, and it will be passed on for generations to come.

Your antique brooch will arrive presented in a luxury modern jewellery box.

Any questions? Please send us an email or call 01793 340 086.