Belle Époque Emerald and Diamond Brooch Octagonal-cut Emerald of 12.14 Carats, Square-shaped Emerald, Old-cut Diamonds

A 12.14 carat emerald is, on its own, a genuinely rare object — emeralds of this size with the clarity needed to be cut into a clean octagonal step form are uncommon enough that most collectors will encounter only a handful across a lifetime of serious acquisition. This Belle Époque emerald and diamond brooch is built around exactly that stone, its octagonal-cut emerald joined by a further square-shaped emerald and surrounded by old-cut diamonds, the entire composition mounted in platinum in the refined, lace-like style that defines the period so distinctly.

Platinum as the metal and the 12.14 carat weight of the principal emerald are both confirmed directly from the piece's documentation — figures we can state with confidence precisely because they were independently recorded rather than estimated. Individual clarity and colour grading for the emeralds, along with total diamond weight, remain on request pending further verification, and we hold that distinction deliberately rather than rounding the picture out with assumption. The old-cut diamonds surrounding the emeralds provide the warmer, more romantic sparkle associated with hand-faceting of the period, a deliberate contrast to the emerald's cool, saturated green that Belle Époque jewellers used to great effect throughout their finest work.

A stone and setting of this calibre is, by nature, a centrepiece — worn on the lapel of a formal evening coat or as the sole ornament on a solid-colour gown, where the scale of the emerald can command the room without competing against pattern or additional jewellery nearby. Emeralds of this size and platinum settings of this era both carry genuine investment characteristics: large, well-matched emeralds rarely return to the market once acquired by a serious collector, and platinum Belle Époque work of this quality is increasingly difficult to source as estates hold rather than sell such pieces. The pin mechanism is substantial, built in proportion to the weight it is designed to carry.

Every gemstone offered through Legacy is reviewed internally by our team before sale, and independent certification is arranged on request for clients who wish a third-party gemological opinion in addition to our own. Given the scale of this piece, we manage every stage of acquisition with particular discretion, from first enquiry through final delivery. This brooch is recorded in the Legacy register as LD-BR-0060. Few houses can currently offer an emerald of this size in an authenticated period platinum mount, which is part of why we recommend serious collectors move promptly once the full report has been reviewed. We invite serious collectors to request the full report or arrange a private viewing at their convenience.

Specifications

• Metal: Platinum
• Diamond / Gem weight: 12.14ct
• Cut / Shape: Emerald Cut
• Gemstones: Emerald