Moissanite & lab diamond engagement rings crafted to last a lifetime.

Complimentary worldwide shipping

The Classic Comfort Fit Band – 3mm

From $550.00

A classic and sleek unisex band.

Details: This solid 3mm unisex band is perfect for stacking or wearing alone. With rounded edges, it's extra comfortable for daily wear, especially for those not used to wearing rings.


  • All pieces are lovingly crafted by jewelers with over 15 years experience
  • All stones are lab-created: an eco-friendly, ethical and sustainable alternative to mined gemstones
  • Stone measurements and carat-equivalent weights are approximate

We're happy to customize any of our rings to your preferences! For example, you might like to:

  • Change the stone shape
  • Add or remove pavé
  • Add your own design elements
  • Come up with something totally new!

Simply contact us and we would be happy to provide a free quote and bring your dream ring to life.

Complimentary international shipping on all orders

3 Attributes - Ring

Lifetime Warranty

We guarantee that your moissanite will stay beautiful, clear and sparkly for your lifetime. Click here for details.

3 Attributes - Customer Care3

Customer Care

Enjoy complimentary shipping, free ring cleaning, ring re-sizing, a flexible return policy and more. Click here to learn more.

3 Attributes - Eco Friendly00

Eco-Friendly &
Socially Responsible

Our lab-created stones are ethically sourced and an environmentally-friendly alternative to mined diamonds.

More Information:

All of our rings are custom made and this means we are able to accommodate any ring size - even fractions of sizes (such as 5.25, 9.75, etc.) at no additional cost. If you want to order a size you don't see in the dropdown, simply contact us and we will be happy to accommodate your chosen size!

We are happy to offer one free ring size adjustment on all ring orders (up to 1.5 sizes).*

*Some ring styles are unable to be re-sized. Click here to read more about finding your ring size and more details on our re-sizing policy.

All stone sizes are listed in millimeters and shown as length x width. To find the approximate carat equivalent size for each size shown in millimeters, click here to view our carat equivalent charts.

We are able to create almost any size stone, even if you don't see it listed on this product page! Simply contact us and we'll be happy to give you a quote for a stone in the exact size you're looking for.

14 Karat Vs. 18 Karat:

Visually, the difference between 14K and 18K gold (including white, yellow and rose) is very minor. Yellow and rose gold in 18K are just slightly deeper in color than they are in 14K.

But the most significant differences between 14K and 18K gold are value and hardness.

14K is the most commonly-used metal type for everyday jewelry including engagement rings. It has a moderately high gold content and is technically a harder, stronger metal alloy than 18K.

18K contains an even higher gold content than 14K - making it more valuable. The downside is that this higher gold content can make the metal alloy very slightly more prone to bending, as gold itself is a soft, malleable metal.

White Gold Vs. Platinum:

White gold does not exist in nature. It is simply a modified version of yellow gold that includes a bright plating! This will look very similar to platinum initially but can fade to a slightly warmer-toned white over the years. Some people love this slightly warmer look and don't ever want to get it re-plated! But if you don't love it, we can re-dip your ring to get the bright white look again.

Platinum will never need to be re-plated as it is naturally bright white. That being said, platinum is not always the perfect metal for all ring types - we recommend it for simpler styles without pavé. 

If you need help deciding which metal to use for your ring, simply send us a message! We'd be happy to help with absolutely no purchase obligation.

All Castlefield Collection pieces are lovingly made to order.

Our creation timeline is currently averaging 8-9 weeks

Once your piece has been crafted, we will ship it to you free of charge from Toronto, Canada and will send you the tracking number. All orders will require a signature upon delivery to ensure your precious ring arrives safely.

Please click here to read more about our order process, timeline, rush orders, shipping, cancellation policy and more.

We take great pride in the quality and durability of our jewelry. Each piece is carefully crafted to last a lifetime by jewelers with over 15 years experience.

We're proud to offer a lifetime guarantee that your Castlefield Collection moissanite will never yellow or turn cloudy. We only offer premium-tier moissanite that will stay sparkly, bright and clear - or we will replace it free of charge! Read more about our warranties and store policies here.

Here's what our customers say


Try our FREE

Stone Size Stickers

Not sure which stone shape or size will suit you best?

Use our stickers to try on a variety of stone shapes in a wide array of sizes! Then, you can be sure you're choosing the size that works best for your hand and finger size.

We'll even cover the shipping cost!

Contact Us

customer service

Hi, I'm Jordan! Creator of Castlefield Collection and your personal ring concierge. I'm happy to answer any questions you may have - with absolutely no purchase obligation.

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