Sapphire and Diamond Pendant Rectangular-shaped Sapphire of 39.80 Carats, Round and Baguette-cut Diamonds, 18K and 14K R

A rectangular-shaped sapphire weighing 39.80 carats is, without exaggeration, a rare object — the kind of single stone that most collectors will encounter only a handful of times across a lifetime of serious acquisition. This piece places that sapphire at its center, held within a mounting of 18k and 14k rhodium-plated gold and framed by round and baguette-cut diamonds that trace clean, structured lines around the stone's rectangular silhouette.

At nearly forty carats, a sapphire of this size necessarily reads differently than the smaller accent stones typical of most brooch designs — this is a stone meant to be the entire conversation, with the diamonds and gold serving a supporting role rather than competing for attention. Rectangular and emerald-style cuts are typically reserved for sapphires of exceptional clarity, since the cut's broad, step-faceted planes expose inclusions far more readily than a brilliant or cushion cut would; a stone cut this way at this size suggests a level of internal quality that justified the cutter's decision to prioritize transparency over concealment. The rhodium plating on the gold mount, meanwhile, is a detail worth noting for practical reasons — it lends a bright white finish to the gold that resists tarnish and keeps the setting from competing visually with the blue of the sapphire.

Colour and clarity grades specific to this stone are not confirmed in our archive listing, so we hold them as on request pending full gemological review, which we would strongly encourage any serious buyer to request given the scale of the piece. As a brooch or convertible pendant — the design accommodates both — it is built for occasions where its scale can be appreciated fully: a formal gown shoulder, a lapel at a black-tie event, or worn as a pendant on a simple chain to let the sapphire hang as the singular focal point. Mechanism details for the conversion and the pin's fitting are available on request.

A sapphire of this magnitude functions as much as a store of value as it does an ornament — stones at this carat weight with rectangular clarity-forward cutting are genuinely scarce in the market, and that scarcity tends to hold or appreciate over time far more reliably than smaller, more commonly available stones.

Independent certification is available on request and strongly recommended given the sapphire's exceptional size. This piece is presented by Legacy Diamonds and Gemstones, entered into our register with the full documentation such a stone deserves.

We welcome a private conversation about this sapphire — its provenance, its cutting, and how it might be worn or reset to suit you. Reach out at your convenience.

Specifications

• Metal: 18K
• Diamond / Gem weight: 39.8ct
• Cut / Shape: Baguette, Round Brilliant
• Gemstones: Sapphire