Ceruleana
A 0.94-carat fancy vivid blue marquise-cut lab diamond on a round shank, in 10k white gold. Fancy vivid is the rarest saturation grade in blue — above fancy intense — and most lab growers can't reliably produce it. The white gold lets the stone do its full work. Ceruleana is the Latin root of the word for the color of deep water.
The Object
- Name: Ceruleana
- Silhouette: Round shank solitaire
- Edition: One of one
- Size: US 6
- Collection: Pinky Ring Drop, Spring 2026
The Stone
- Type: Lab-grown diamond
- Cut: Marquise
- Carat weight: 0.94 ct
- Color: Fancy vivid blue
- Clarity: Eye-clean
- Dimensions: 9.81 × 4.88 × 2.11 mm
- Accent stones: None
- Color significance: Fancy vivid is the highest saturation grade in colored diamonds — above fancy intense — and is especially rare in blue, requiring precise boron saturation during growth. The color depth in this stone is exceptional.
The Metal
- Metal: 10-karat solid white gold
- Gold content: 41.7% pure gold (417 stamp)
- Gold weight: 2.05 grams
- Shank: 1.7 × 1.7 mm
- Finish: High polish, rhodium plated
- A note on 10k: 10-karat gold is the strongest everyday gold alloy — more scratch- and dent-resistant than 14k or 18k. White gold in particular was chosen here to keep the stone's blue saturation pure; yellow metal behind a cool-toned diamond will always mute its color.
Measurements
- Ring size: US 6
- Shank: 1.7 × 1.7 mm
- Profile height off finger: 4.80 mm
This ring is a one-of-one piece in a single size. It cannot be resized without compromising the design. If you are between sizes or would like to discuss a custom version in your size, please book an appointment.
Provenance & Certification
- Stone sourcing: Sourced through Catherine Peck's trusted lab-grown diamond partners
- Certification: Center stone IGI certified, report number LG586338927, for those who'd like the paper on record.
- Metal: Recycled 10-karat white gold
Read more on our approach to stones and certification → On Stones
Production & Delivery
This ring has already been made. It exists in a single size, as a single object. Once it finds its wearer, it cannot be remade.
Delivery: Complimentary insured shipping within the US. Signature required on delivery. International shipping available on request.
Care
10-karat gold is durable enough for daily wear, including water exposure. For longevity, we recommend removing the ring during high-impact activity (weight training, rock climbing, manual labor) and avoiding direct contact with harsh chemicals including chlorine, bleach, and acidic cleaners. A soft-bristled brush and mild soap in warm water is sufficient for home cleaning. We offer complimentary lifetime polishing and inspection on every piece.
