Cyan Blue Portuguese Cut Lab-Grown Diamond Engagement Ring | Four Claws, Plain Petal Shoulders

Specifications

• Piece: Sold with the center stone below — this cut is not offered in the diamond selector
• Center stone: 1.50ct portuguese cut lab-grown cyan blue diamond, VS clarity
• Accent stones: None — center stone only
• Stone orientation: Face-up round
• Setting: four claws on an open gallery, with plain polished leaf shapes rising from the shoulders under the head of a slim yellow-gold shank
• Metal: 10K, 14K & 18K solid gold and platinum
• Certification: IGI certificate on center stones of 1 carat and above
• Ring sizes: US 3–10, including half sizes
• Made to order: 1–2 week production, then shipping

This is the plainest way to show a colored Portuguese cut: a 1.5 carat lab-grown cyan blue diamond on four claws, with small polished leaves rising under the head and nothing else. The teal carries the ring.

The setting

Four claws keep the round outline mostly open, so more of the facets and the teal color show than in a six- or eight-claw head. The polished petals under the head add shape without stones, a detail visible mainly in profile. The shank is about 1.6 millimeters and tapers slightly toward the center. The Portuguese cut and the cyan blue color are not in the diamond selector; this stone is sourced to go with this setting.

About our lab-grown diamonds

The center stone is a lab-grown colored diamond — the same carbon crystal, hardness and optical behavior as a mined diamond, grown rather than extracted, with its color from trace elements or post-growth treatment as stated on its certificate. Accent stones are colorless lab-grown diamonds matched to one another for color and clarity.

Common questions

Is four claws enough for a 1.5 ct round?
Yes. Four is the standard for rounds and leaves the most of the stone visible. The trade-off is that losing one claw matters more, so have them checked once a year.

How does teal look against yellow gold?
Yellow gold warms the stone slightly, so it leans a little greener than it would in white gold. Daylight shows the most blue.

Do the photographs show the exact ring I will receive?
The design, the cut and the carat weight, yes. Individual stones vary slightly, and colored stones in particular read differently under daylight and warm indoor light. We photograph your finished ring and send you those images before it ships.

Where does the color come from?
Lab-grown colored diamonds take their color either from trace elements during growth or from a treatment after growth, and the certificate states which. Either way the color is stable in normal wear and cleaning; avoid holding the ring in a jeweler's torch flame during any repair, which is the one thing that can alter treated color.

Is the center stone certified?
Yes. Every center stone of 1 carat and above ships with an IGI certificate stating carat, cut, color and clarity. Accent and pave stones are matched to the same color and clarity range but are not individually certified.