Collection: Lab Grown Diamond Engagement Rings

Diamond shape determines the outline of the center stone and has a major influence on its proportions, face-up appearance and pattern of light return.

Round Lab Grown Diamond Engagement Rings feature the classic round brilliant cut, known for symmetry, strong light return and versatility across a wide range of engagement ring settings.

Oval Lab Grown Diamond Engagement Rings combine brilliant-style faceting with an elongated outline that provides additional length and visual coverage across the finger.

Emerald Cut Lab Grown Diamond Engagement Rings feature elongated proportions and step-cut facets that create broad flashes of light and a distinctive geometric appearance.

Radiant Cut Lab Grown Diamond Engagement Rings combine an angular outline and cropped corners with brilliant-style faceting for a balance of geometric structure and sparkle.

Pear Shaped Lab Grown Diamond Engagement Rings combine a rounded end with a tapered point to create an elongated, asymmetrical silhouette.

Marquise Lab Grown Diamond Engagement Rings feature an elongated shape with pointed ends and can provide substantial face-up coverage for their carat weight.

Cushion Cut Lab Grown Diamond Engagement Rings feature softly rounded corners and brilliant-style faceting, with both traditional and elongated proportions available.

Princess Cut Lab Grown Diamond Engagement Rings combine a square geometric outline with brilliant-style faceting for a clean, modern appearance.

The setting determines how the diamond is secured and has a major influence on the overall appearance, profile and detailing of an engagement ring.

Solitaire Lab Grown Diamond Engagement Rings place a single focal diamond at the center of the design, keeping attention on the shape and proportions of the center stone.

Pavé Lab Grown Diamond Engagement Rings feature small diamonds set along the band for additional brilliance surrounding the center stone.

Halo Lab Grown Diamond Engagement Rings surround the center diamond with smaller diamonds, adding sparkle and increasing the visual footprint of the center setting.

Hidden Halo Lab Grown Diamond Engagement Rings position accent diamonds beneath the center stone, adding detail from the profile while preserving the outline of the center diamond when viewed from above.

Bezel Lab Grown Diamond Engagement Rings surround all or part of the center diamond with precious metal, creating a defined perimeter and providing additional protection around the stone.

Toi Et Moi Two Stone Lab Grown Diamond Engagement Rings feature two focal diamonds within a single design. Gema&Co Toi Et Moi rings often pair contrasting shapes such as round and emerald, oval and pear, or oval and marquise to create a distinctive two-stone composition.

Three Stone Lab Grown Diamond Engagement Rings feature a focal center diamond accompanied by two distinct side stones, creating additional width and visual interest across the finger.

Carat is a measurement of diamond weight rather than physical dimensions. Two diamonds with the same carat weight can therefore appear noticeably different in size depending on their shape, depth and proportions.

1 Carat Lab Grown Diamond Engagement Rings feature center diamonds from 1.00–1.99 carats. A well-proportioned 1 carat round diamond typically measures approximately 6.4–6.5 mm in diameter, while elongated shapes can distribute their weight across greater length.

2 Carat Lab Grown Diamond Engagement Rings feature center diamonds from 2.00–2.99 carats and provide a noticeable increase in visual presence while retaining a broad range of shape and setting options.

3 Carat Lab Grown Diamond Engagement Rings feature center diamonds from 3.00–3.99 carats. At this size, shape, dimensions and length-to-width ratio can create substantial differences in face-up appearance.

4 Carat Lab Grown Diamond Engagement Rings feature center diamonds from 4.00–4.99 carats for shoppers looking for greater finger coverage and visual presence.

5 Carat & Up Lab Grown Diamond Engagement Rings feature center diamonds beginning at 5.00 carats.

When comparing carat weights, consider the diamond's millimeter dimensions and proportions alongside carat weight. Gema&Co's Lab-Grown Engagement Ring Buying Guide explains why two diamonds with the same carat weight can have noticeably different dimensions and face-up appearances.

A lab grown diamond is a diamond created in a controlled laboratory environment rather than formed naturally underground. Lab grown and mined diamonds are both crystallized carbon and share the same fundamental chemical composition and crystal structure.

Lab grown diamonds should not be confused with diamond alternatives such as moissanite or cubic zirconia. Moissanite is silicon carbide and has different optical and physical properties from diamond.

Like mined diamonds, lab grown diamonds vary in cut, color, clarity, carat weight and overall quality.

Gema&Co lab grown center diamonds are selected for quality, appearance and proportions.

Lab grown diamonds 1.00 carat and larger are IGI graded. Diamonds 0.99 carat and below are not individually graded.

An IGI grading report provides an independent assessment of characteristics such as carat weight, color, clarity and diamond measurements. These characteristics should be considered together rather than evaluating a diamond solely by carat weight.

Lab grown diamonds and moissanite are different gemstones even though both are popular center-stone options for engagement rings.

A lab grown diamond is crystallized carbon and has the same fundamental material properties as a mined diamond. Moissanite is silicon carbide and has different optical properties, including greater dispersion that can produce more noticeable flashes of spectral color.

The choice between them generally comes down to gemstone preference, appearance and budget. Browse Gema&Co Moissanite Engagement Rings to compare available designs.

Gema&Co lab grown diamond engagement rings can be customized across diamond shape, carat weight, precious metal and setting details.

For more extensive modifications or an original design, Gema&Co also offers custom engagement rings. Our Guide to Designing Your Own Engagement Ring explains the custom design and casting process in more detail.