For those who appreciate the finest craftsmanship, this natural blue sapphire halo necklace in 18ct white gold is a piece of genuine luxury. At its heart, a 0.58ct emerald-cut blue sapphire — an octagonal form that showcases the stone's clarity and depth with architectural precision — is prong-set and surrounded by a delicate halo of 17 brilliant-cut diamonds (0.05ct). The 18ct white gold setting, hallmarked to 750 purity, gives the piece an exceptional cool-white lustre that perfectly offsets the sapphire's rich blue.

Suspended on a fine 16-inch (41cm) trace chain with a trigger clasp, this pendant rests gracefully at the collarbone. The 18ct gold construction makes this a true heirloom-quality piece — far more precious and enduring than 9ct alternatives. An unforgettable luxury September birthstone necklace and a truly distinguished gift.

• Centre Gemstone: 0.58ct natural blue sapphire, emerald cut / octagon (6×4mm), prong-set
• Diamond Halo: 17 round brilliant-cut diamonds, 0.05ct total (H–I colour, I2–I3 clarity), micro-set
• Total Gemstone Weight: 0.63ct sapphire and diamonds combined
• Metal: 18ct White Gold (750 hallmarked), 1.3g — premium purity and lustre
• Chain: 18ct White Gold Trace Chain, 16 inches (41cm), trigger clasp
• Birthstone: September — blue sapphire, a gemstone of royalty, wisdom, and elegance
• Certificate: Supplied with a Certificate of Authenticity