Say yes with real, IGI-certified diamond brilliance at a fraction of a mined diamond's price. Our lab grown diamond engagement rings collection features 42+ styles, each set with a genuine lab grown diamond — chemically, physically, and optically identical to a mined stone — in premium 10k, 14k, and 18k solid gold. Whether you're searching for a classic lab grown diamond ring or a bolder halo and trilogy design, every lab grown diamond engagement ring in this collection ships with IGI certification, available in yellow, rose, and white gold. Explore standout pieces like the 2.5 TCW Round Brilliant Solitaire or the TCW 2.58 Oval-Cut Cluster Design Ring. Every ring ships with free U.S. shipping and a lifetime warranty.

Why Choose Lab Grown Diamond Engagement Rings

A lab grown diamond is a real diamond — grown in a controlled lab environment rather than mined from the earth, but chemically, physically, and optically identical to a natural stone. Choosing a lab grown diamond ring means the same fire, hardness, and brilliance as a mined diamond, typically at 30–50% less cost, letting you invest in a larger center stone or premium solid gold setting without stretching your budget. Every lab grown diamond engagement ring in our collection is IGI certified, giving you independent verification of the stone's cut, color, clarity, and carat weight.

Shop Lab Grown Diamond Rings by Stone Shape

Our lab grown diamond engagement rings collection spans every major stone shape, including round, oval, princess, pear, emerald, cushion, radiant, and marquise cuts. Popular picks include the 4.04 TCW Round Cut Vintage Multi-Stone Ring, the 14kt Solid Gold 2.93 TCW Princess Cut Halo Ring, and the Yellow Gold 2.35 TCW Pear & Round Split Shank Ring. For a symbolic design, the 3 TCW Emerald Cut Three-Stone "Past, Present, Future" Ring is a standout trilogy style.

Shop Lab Grown Diamond Rings by Setting Style

Solitaire — A single lab grown diamond in a classic prong setting, like the 1.5 TCW Round-Cut Classic Solitaire Ring.

Halo — A center diamond ringed with pavé accents, like the 14kt Cushion-Cut Halo Ring.

Trilogy / Three-Stone — Symbolizing past, present, and future, like the 18kt Rose Gold Princess Cut Trilogy Ring.

Bridal Sets — A matched engagement ring and band, like the 1.87 TCW Dual Band Solitaire Bridal Set.

Choose Your Gold Tone and Purity

Every lab grown diamond ring in this collection is available in yellow, rose, and white gold, and spans 10k, 14k, and 18k purities — so you can balance durability, tone, and budget to match your everyday style.

Lab Grown Diamond vs. Moissanite: Which Is Right for You?

Not sure whether a lab grown diamond or moissanite is the better fit? Both are ethical, conflict-free alternatives to mined diamonds. A lab grown diamond is chemically identical to a natural diamond and carries the same hardness and prestige, while moissanite offers even greater fire and brilliance per dollar.

If you'd like to compare, browse our full moissanite engagement rings collection alongside this one, or reach out to our team for personalized guidance.

Understanding IGI Certification and the 4Cs

Every diamond in this collection is graded by the International Gemological Institute (IGI) across the traditional 4Cs — cut, color, clarity, and carat weight — giving you the same independent verification you'd expect from a mined diamond purchase.

Not sure what ring size to order? Check our Size Chart before checkout, or contact our team for personalized guidance on selecting a lab grown diamond engagement ring that fits your budget and style.

Why Shop Lab Grown Diamond Rings at Kosei Moissanites

• IGI-certified lab grown diamonds in every ring
• 10k, 14k, and 18k solid gold in yellow, rose, and white tones
• Free shipping across the USA & worldwide
• Lifetime warranty
• Custom design service for a fully bespoke lab grown diamond ring

FAQ: Lab Grown Diamond Engagement Rings

Is a lab grown diamond a real diamond?

Yes. A lab grown diamond has the same chemical composition, hardness, and optical properties as a mined diamond — the only difference is where it was formed. It is not a diamond simulant like moissanite or cubic zirconia.

What does IGI certified mean?

IGI (International Gemological Institute) certification means the diamond has been independently graded for cut, color, clarity, and carat weight, giving you verified, third-party documentation of its quality.

What is the difference between lab grown diamond rings and moissanite rings?

A lab grown diamond is chemically identical to a mined diamond, while moissanite is a separate gemstone known for even greater fire and brilliance at a lower price point. Both are ethical and conflict-free. Compare styles in our moissanite engagement rings collection.

Do you ship lab grown diamond engagement rings within the USA?

Yes, we offer free shipping on all U.S. orders, and every ring includes IGI certification and a lifetime warranty.