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Lab Grown Diamond Plain Engagement Rings

Crafted by our jewelers with care and precision.

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Engagement Rings — The Start of Your Forever.

At Cullen, we recognize the importance of finding an engagement ring that reflects your style and the unique beauty of your relationship.

Using responsibly sourced materials and lab grown gemstones, every Cullen engagement ring is thoughtfully designed in Melbourne, Australia and brought to life by our expert jewelers. Whether you prefer a solitaire, halo, vintage-inspired ring or an entirely unique design, our wide variety of existing styles and specialized custom design process ensures there is a perfect fit for everyone.

Explore the collection online or begin your journey in one of our showrooms with a personalized design consultation — whatever the process, we're here to help you start your forever with the ring of your dreams.

Find Your Perfect Engagement Ring with Cullen

Cullen specializes in custom engagement rings, handcrafted to mark one of life’s most meaningful moments in a style unique to your love.

Our extensive range of existing engagement ring styles and personalized custom design process enable you to explore, envision and create an engagement ring that is both long-lasting and personal to your love story.

Whether you’re after a sleek solitaire or a vintage-inspired halo of diamonds, our experienced jewelers and warm, knowledgeable client service team will guide you through every step of the journey — from your first consultation to the final polish.

Need a little guidance? Don’t hesitate to contact us or book an in-person appointment with one of our friendly engagement ring specialists to begin designing your dream piece.

The Cullen Difference

Worldwide Express Shipping
No matter where you are in the world, your dream ring will go the distance. We proudly ship all of our engagement rings to the US and internationally, ensuring your custom piece arrives safely and swiftly.

Free Resizing
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.

Tailored Ring Customization
From unique engagement ring designs to personalised band details, we offer an extensive customization service so you can craft a ring that’s truly one of a kind

Thoughtfully Designed in Melbourne, Australia Every ring —  including our custom engagement rings, is crafted by our expert jewelers with exceptional attention to detail.

Conflict-Free, Consciously Crafted
We offer a variety of unique options from diamond engagement rings to sapphire engagement rings, all thoughtfully curated for your forever ring.

Carbon Neutral Gemstones & Trees For The Future We offset the carbon footprint of all of our gemstones and plant a tree for each ring sold, supporting global reforestation.

Custom Design Specialists
Whether you're dreaming of a minimalist solitaire engagement ring or a striking emerald cut engagement ring, our team specializes in creating jewelry that reflects your personal style.
 

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

Absolutely. Cullen specializes in custom-designed engagement rings. Choose from a range of center stones, side stones, and precious metals, as well as various settings from three-stone, to halo, and more. Our experienced engagement ring specialists will guide you through the design process to create the perfect engagement ring that reflects your unique personal style.​

Yes, men can and do wear engagement rings. Though traditionally worn by women, the decision to wear an engagement ring is entirely up to the individual. Regardless of gender, an engagement ring symbolises the love and commitment one has for another.

An engagement ring typically features a prominent stone and is presented during a marriage proposal, while a wedding ring has a simpler design and is exchanged during a wedding ceremony. Traditionally, an engagement ring is worn by one partner as a symbol of the promise to marry, while wedding rings are worn by both spouses as a sign of their union. For more information, explore our wedding ring guide.

The way you wear your engagement and wedding rings together depends on the design of each ring. When selecting your wedding ring, it is important to consider the design of your engagement ring to ensure your wedding ring will both complement and sit comfortably alongside your engagement ring. If you’d like some guidance, feel free to book a consultation with our friendly client service team or learn more from our guide on how to find the perfect wedding band pairing.

We offer a selection of ethically sourced gemstones in our engagement rings for women and in our men's engagement rings, including:​

• Lab-grown diamonds

• Moissanite

• Lab-grown sapphires

Each gemstone is chosen for its quality and sustainability, ensuring your ring is both beautiful and responsibly made. Whether you’re after a scarlet red lab-grown sapphire that mimics the look of a ruby engagement ring or a clover green lab-grown moissanite that resembles an emerald, begin your journey today by exploring our wide range of engagement rings. For more information and guidance on which gemstone is best for you, dive into our gemstone guide.

The price of engagement rings at Cullen varies based on factors such as the chosen gemstone, carat weight, and setting design. We offer a range of designs to suit different budgets, and our team can help you find or create a ring that meets your preferences and price point.​

To maintain the brilliance of your diamond engagement ring:

• Clean it regularly with mild soapy water and a soft brush.

• Avoid exposing it to harsh chemicals or abrasive materials.

• Store it separately to prevent scratches.

• Schedule periodic professional cleanings and inspections.​

Proper care will keep your ring looking its best for years to come.​ For more information, check out our ring care and ring cleaning guides here.

Our warm, helpful client service team is available to assist you on your journey to creating your own unique engagement ring. Whether you have a custom design already in mind or would simply like to make a few adjustments to an existing design, we are ready to assist you through the process of designing your own custom engagement ring.

Cullen offers a variety of precious metal options for your wedding and engagement rings, including yellow gold, white gold, and platinum. Our team can help you choose the best metal to complement your chosen center stone and desired design.

The lead time for a custom diamond engagement ring varies depending on the complexity of the design. Our team will provide you with an estimated completion date once your design is finalized. The crafting stage takes 8-10 weeks, and for all general timeframe information, please visit our crafting timeframes page.

Yes, we invite you to visit our showrooms to view our complete range of gold engagement rings and other fine jewelry. We have a wide variety of engagement ring styles in-store, including some of our most popular diamond engagement rings, rose gold engagement rings and sapphire engagement rings. You can also browse our online ring builder page to explore our collection and start designing your perfect diamond ring.

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.​