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Trilogy Lab Grown Diamond Engagement Rings

Crafted by our jewellers with care and precision.

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Trilogy Engagement Rings — For Love That Transcends Time

Three stone engagement rings, also known as trilogy rings, are more than just a beautiful piece of jewelry. Celebrated for their symbolism, each of the three stones represents a chapter in a couple’s journey: the past they've cherished, the present they share, and the future they’re building together. This deeper meaning makes three stone rings a perfect choice for modern proposals and significant milestones alike. With design flexibility that accommodates a variety of center stone shapes, gemstone pairings, and band styles, this timeless design effortlessly blends classic elegance with modern sophistication.

At Cullen, we believe creating a 3 stone engagement ring should be just as memorable as the ring itself. Our collaborative design experience empowers couples to bring their vision to life—crafting a one-of-a-kind handmade piece that reflects their story with intention and artistry.

Begin your journey with our engagement ring builder or book a consultation to create a piece that’s truly yours.

Let Your Love Shine Through Every Stone

At Cullen, we specialize in custom-made engagement rings to complement your perfect proposal. We combine the knowledge of experienced jewelers and an exceptional client service team that can help guide you through every step of the engagement ring design process, from concept to completion.

Need help choosing your dream Trilogy engagement ring in the US? Book a virtual or in-person appointment at our showroom to talk to one of our friendly engagement ring specialists.

Why Cullen

Worldwide Express Shipping No matter where you are in the world, your dream ring will go the distance. We proudly ship our wedding and engagement rings across the United States and internationally, ensuring your ready-to-ship engagement ring arrives safely and swiftly.

We offer free resizing on all engagement rings to ensure the perfect fit, whether you've chosen one of our ready-to-ship engagement rings or something uniquely your own.

Lifetime Warranty Our engagement rings are built to last a lifetime. Each piece is backed by our lifetime manufacturing warranty , giving you complete peace of mind.

Free Ring Customization From unique engagement ring designs to personalized band details, we offer complimentary customization so you can craft a ring that's truly one of a kind.

Handcrafted in Australia Every ring — including our ready-to-ship engagement rings — is designed and handcrafted in our Melbourne workshop with exceptional attention to detail.

Conflict-Free, Sustainable Materials We offer a variety of unique options — from ready-to-ship lab diamond engagement rings to sapphire engagement rings — all ethically lab grown and sustainably sourced.

Carbon Neutral & One Tree Planted Partner We offset the carbon footprint of every order and plant a tree for each ring sold, supporting global reforestation.

Custom Design Specialists Whether you're interested in solitaire oval engagement rings or striking emerald cut engagement rings , our team specializes in creating custom pieces that reflect your personal style.

Looking for a specific style? Choose from our collections below:

A three stone ring represents a couple’s journey — honouring their past, celebrating their present, and looking forward to their future together.

Yes, both terms describe the same concept: a ring featuring three stones, each rich with meaning.

Absolutely. Their meaningful symbolism and versatile design make them a lasting favorite among couples today.

Definitely. Many people mix gemstones—like sapphires or colored diamonds — with traditional center stones to create something deeply personal and truly unique.

Three stone oval engagement rings are especially sought after for their elegant elongation, though most shapes work beautifully in this setting, including emerald, brilliant, and cushion cuts.

Yes, three stone rings are often created with lab grown diamonds for a more sustainable and responsible choice.

Not at all. Most three stone rings feature a larger center stone, flanked by slightly smaller side stones for contrast and balance.

It depends. While there are more stones involved, the overall price comes down to the size, the 4Cs of diamond quality, and choice of gemstones.

Yes. When crafted with quality materials and secure settings, three stone rings are durable enough for daily wear.

Absolutely! Visit our custom designs page to explore the process and easily customize your perfect three stone ring online or in person.

Yes, we offer complimentary resizing for all our engagement rings. If your ring doesn't fit perfectly, simply contact us, and we'll adjust it to ensure a comfortable fit.​

All gold and platinum jewelry from Cullen comes with a lifetime manufacturing warranty. This warranty covers any defects in materials or workmanship, giving you peace of mind that your ring is crafted to the highest standards.​