Impressive Early 20th Century Diamond Brooch Old Circular-cut Diamond of 14.97 Carats

A single diamond exceeding fourteen carats is a rare enough sight in any era, and this early twentieth-century brooch places one at its unmistakable centre — an old circular-cut diamond weighing 14.97 carats, cut by hand in the manner characteristic of the period before modern brilliant-cut proportions became standard. Old circular cuts carry a distinctive warmth in their light return, a softer, more candlelit sparkle than the sharper contemporary round brilliant, prized by collectors precisely because that quality cannot be replicated by modern cutting machinery.

Metal composition, mounting details, and colour and clarity grading are available on request. A diamond of nearly fifteen carats, cut in the early twentieth century and surviving to the present day in a brooch mounting, represents genuine rarity on two fronts at once — the scale of the stone itself, and the historical authenticity of a period cut that few comparable pieces retain unaltered. Many large antique diamonds were recut over the decades to modern proportions, sacrificing period character for marginal gains in brilliance; a stone of this size that has kept its original old circular cut is correspondingly harder to find.

A centre stone at this weight functions as the clear focus of the entire piece, with any surrounding mount or accent work necessarily secondary to the diamond itself. This is, in effect, jewellery built to showcase one exceptional stone rather than a broader composition — the kind of acquisition serious diamond collectors seek out specifically, valuing rarity of scale and cut history above elaborate surrounding design.

Worn on the body, a brooch of this stature is suited to the most formal occasions — a gala, a significant family celebration, or any evening where a single exceptional stone is meant to be the focus of attention rather than one element among several. Given its scale and age, the piece functions as much as a considered investment in tangible, appreciating material as it does an ornament, a distinction that matters to collectors thinking beyond a single season of wear. Old European and old circular cuts have also seen renewed appreciation in recent years among buyers who prize character and history over maximum theoretical brilliance, a shift that has only strengthened demand for well-preserved period stones of this scale.

Given the size and significance of the centre stone, independent gemmological certification can be arranged prior to purchase, documentation we regard as standard practice at this level of acquisition. The pin mechanism has been inspected and found secure ahead of listing, and any condition history appropriate to a piece of this age is shared candidly with genuinely interested parties.

This brooch is recorded in the Legacy house register as one of our most significant early twentieth-century diamond holdings. Our senior advisors welcome a confidential, unhurried conversation about the stone's history and would be glad to arrange a private viewing at your convenience.

Specifications

• Diamond / Gem weight: 14.97ct