A 6.41-carat natural moonstone (17.1 × 7.8 mm) and a 0.50-carat D-color VS1 round-brilliant lab diamond, set opposite each other on a 4 mm 10k yellow gold anchor chain — the toi et moi format extended from finger to neck. Moonstone reads silver, cloudy, and shifting; diamond reads colorless, clean, and lit. Two entirely different ways of holding light, held together at 17 inches. The Object Name: Nocturne Silhouette: Two-stone toi et moi necklace on anchor chain Edition: One of one Collection: Diptych The Stones Type: 1 natural moonstone and 1 lab-grown diamond Stone 1: 6.41 ct natural moonstone, elongated cabochon, 17.1 × 7.8 mm, set in 8-claw prongs in 10k yellow gold — uncertified Stone 2: 0.50 ct round brilliant lab-grown diamond, D color (colorless — the top grade on the GIA color scale), VS1 clarity (very slightly included; inclusions difficult to see under 10× magnification), IGI certified, report number LG741547713 Pairing significance: The moonstone and the D-color diamond sit at opposite ends of how a stone can carry light — one diffuses it through adularescence, the other refracts it through cut. Set opposite each other on the chain, the pair reads as a diptych rather than a solitaire with a supporting stone. The Metal Metal: Solid yellow gold throughout Gold content: 10k (41.7% pure gold, 417 stamp) Chain: 4 mm 10k yellow gold anchor chain Clasp: 10k yellow gold lobster clasp Setting: 8-claw prong for the moonstone; four-prong for the diamond Finish: High polish 10-karat gold is the strongest everyday gold alloy — more scratch- and dent-resistant than 14k or 18k, with a warmer, quieter tone. We chose it deliberately, for jewelry that’s meant to be worn, not stored. Measurements Chain length: 17″ Chain width: 4 mm Chain style: Anchor Clasp: Lobster, 10k yellow gold Moonstone weight: 6.41 ct Moonstone dimensions: 17.1 × 7.8 mm Diamond weight: 0.50 ct, round brilliant Provenance & Certification Stone sourcing: Natural moonstone selected in person; lab-grown diamond sourced with IGI certification. Certification: Center 0.50 ct D VS1 lab diamond IGI certified, report number LG741547713. Original certification ships with your order. The moonstone is uncertified; it was personally evaluated by Catherine Peck and selected for how it reads against this specific diamond. Certification for the moonstone is available on request. Metal: Recycled 10k yellow gold — chain, prongs, and clasp Read more on our approach to stones and certification → On Stones Production & Delivery This necklace has already been made. It exists as a single object. Once it finds its wearer, it cannot be remade. Delivery: Fully insured shipping via UPS or USPS, calculated at checkout by package weight. Signature required on delivery. Complimentary on US orders over $500 and international orders over $1,000.