Discover Lab Grown Diamond & Moissanite Engagement Rings
San Francisco, We're Not Far Away
Our San Francisco showroom is set to open this September. Get access to faster resizing, cleaning and polishing services, easy repairs and anything else you may need.Learn More
Diamonds for Your Future
Our lab grown diamonds are 100% Carbon Neutral, certified by Clear Neutral. Choose a ring that's beautiful and helps the planet.Learn More
Need a Hand?
Come see us or book a virtual appointment. We’re here to help you find the perfect ring,
no matter where you are.
Your Story, Our Craft
Tell us your love story, and our in-house jewellers will turn it into the perfect custom ring. Whether you have a design in mind or need some ideas, we'll bring your vision to life.Start the Process
Why Cullen Jewellery
We make special occasion jewellery that everyone can feel good about.
Our engagement rings and fine jewellery feature only carbon neutral lab grown diamonds and moissanite. Using skill and care, our in-house jewellers combine tradition with beautiful design, all while being kind to the earth. Each piece is more than special — it’s a sign of love, made the right way to last forever.Learn More About Us
Your questions, answered.
All our rings, including stunning lab grown diamond rings, are made to order and are usually ready in 40 Business Days. Our collection ranges from laboratory grown diamonds to moissanite, each crafted to perfection.
If you need help selecting from our range of diamond engagement rings or lab grown engagement rings, please contact us here. Our team, experienced in both lab created diamonds and moissanite, will assist you.
Cullen Jewellery offers a free Lifetime Manufacturing Warranty on all our products, including lab grown diamond rings, ensuring peace of mind.
Yes! At Cullen Jewellery, we offer free international shipping on all orders, including those for the perfect diamond engagement ring. Shop online and add your chosen piece to your shopping bag with ease.
Import Duties and Taxes
Most of our orders are sent as DDP (Delivery Duty Paid - this means import duties & taxes are covered). However, there may be cases where you may have to pay local import taxes and duties, which Cullen Jewellery does not cover, as some countries do not allow us to pay them as the sender. For more details, please check our Shipping page or contact your local customs agency.
Our showroom, featuring a range of lab grown diamond rings and moissanite pieces, is open by appointment only. Discover our collection of lab grown diamond engagement rings and moissanite in person or online. Click here for more info!
Yes! Lab grown diamonds, also known as laboratory grown diamonds or ethical lab grown diamonds, are chemically identical to mined diamonds or natural diamonds. They offer the same level of beauty and are an extremely popular choice.
A lab grown diamond, unlike a simulant, has the same chemical and physical properties as a mined diamond. They are aesthetically identical to naturally mined diamonds, offering the same fire and brilliance.
The only difference between a mined diamond and a lab grown diamond is their origin. Lab grown diamonds are an ethical and sustainable option, offering the same fire, clarity, and carat weights as mined diamonds.
Lab grown diamonds are a sustainable option, created using advanced technology under high pressure, which is much more ethical than traditional diamond mining methods.
We specialise in lab grown diamond engagement rings. Our collection, available to shop online, ranges in carat weight and design, ensuring you find the perfect diamond for your needs.
Moissanite is a brilliant choice for those seeking an alternative to a lab diamond engagement ring. It offers the same level of clarity and is graded by Australia-based Radiant Beauty to ensure top quality, just like our lab grown diamond collections. Read more
Yes. Due to its similar properties to diamonds (both lab grown and mined or natural diamond rings), moissanite can pass a diamond tester. However, our specialised equipment can distinguish between moissanite and diamonds, ensuring you know exactly what you're purchasing.
Moissanite is not a fake diamond but a gemstone that offers stunning lab grown beauty. It's perfect for those looking for the same level of sparkle and clarity found in diamonds, but at a more accessible price point. Read more
Absolutely not! Due to its diamond-like appearance, many people believe the misconception that moissanite is a fake diamond when it is in fact a high quality, beautiful gemstone in its own right. Moissanite is becoming an increasingly popular choice of stone in engagement rings due to its dazzling beauty, durability, ease of customisation and affordability. Read more
No, moissanite rings are crafted to exhibit a sparkle that, to the naked eye, is akin to that of diamonds. They offer timeless beauty and are an aesthetically identical choice for those who admire the appearance of mined diamonds. Read more
Moissanite retains its sparkle indefinitely, much like our lab grown and rings. Its clarity and carat weight remain intact, ensuring a lifetime of brilliance. Read More
We make it easy to find your ideal moissanite engagement ring. Request a free ring sizer to determine your correct ring size, and browse our wide selection of moissanite engagement rings on our website. To create a custom ring design, schedule an appointment with our expert team, providing your appointment details. Our specialists will assist you with the entire custom design process to ensure you get the perfect ring. A regular price at Cullen Jewellery offers better accessibility and exceptional value compared to other jewellers.
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