All diamonds are hand-selected by our founder to meet strict beauty and quality standards — the details below are for those who’d like a deeper look.

Diamond Parameters:

Color: D or E (completely colorless)

Clarity: VVS1-VS1 (eye-clean)

All of our diamonds are guaranteed completely colorless D or E color, and completely eye-clean VVS or VS1 clarity (meaning you cannot see any inclusions with the naked eye) with an emphasis on cut quality as the highest priority as it is the biggest determinant of beauty at this high of a color/clarity level.

Ratio Parameters:

Oval: 1.40-1.50

Marquise: 1.85-2.0

Pear: 1.50-1.60

We keep very strict parameters for what we will accept in regards to diamond ratio. As we are curating the diamond for you, we are very committed to ensuring that the ratios are perfectly balanced and will suit the number of prongs and side stones in your setting. Our diamond expert and founder Michelle Keller hand selects the diamond for each ring depending on the setting style, number and position of the prongs, as well as presence or absence of accent stones.

*If there is a particular cut, color, clarity, ratio or faceting pattern you’d like to request, please send us an email PRIOR to ordering to discuss your request. If we have it in stock, we'd be more than happy to accommodate your requests. Since the stones are cut 2-3 months in advance, our in-house diamond inventory changes on a day to day bases.

Material: Metal of choice + Center Stone + 4 teal Australian Sapphire marquise stones + Moissanite or Lab Diamond Round side stones (will match the center stone by default).


Band Width: 2mm

Cut: Oval

Moissanite:Colorless DEF, VVS1-VVS2
Lab Diamond: Premium D or E color, eye clean VVS or VS Clarity, Excellent Symmetry and Excellent Polish
All lab diamonds come with IGI or GIA Certification.

Pavè stones in rings with a moissanite center stone are moissanite by default.

Pavè stones in rings with lab diamond center stones are lab diamond by default.

Non-round side stones in all rings are lab diamond.

Pavè stone quality is DEF VS+.

We craft our rings by hand. Your finished ring may look slightly different than the render previewed. The ring you see online is a close representation of what your custom piece will look like, but your ring is made by artisans and not by computer or machine. Our experienced jewelers finish every single piece, one-by-one, so the subtle differences are what make your ring unique.

Because each ring is made specifically for you, made-to-order pieces are final sale. We’re always happy to help confirm details before and throughout the creation process.

Every piece of Bijou Lab jewelry is created to make a lasting impression. For this reason, all Bijou Lab jewelry pieces are covered by our Limited Lifetime Warranty.

We guarantee that every Bijou Lab piece is crafted to the highest standards of fine jewelry workmanship. Should your piece arrive with a manufacturing defect, we will repair or remake it at no cost to you.

Learn more about our warranty here.

Using our Ring Size Chart

Our Ring Size Chart includes US sizing, UK/Australian sizing, and inside diameter and circumference measurements for reference. This is helpful if you already know your size, are converting from an international size, or are measuring a ring you currently own.

For the most accurate fit

If you’re unsure of your size or between sizes, we recommend using a professional ring sizer—HERE is the gold standard sizing tool used by our master jewelers and setters.

Fit tips

• Fingers naturally fluctuate throughout the day and across seasons
• A well-fitting ring should feel snug and take a few wiggles to get off
• If you’re between sizes or have a larger knuckle, choosing the slightly larger size often feels best long-term to allow for swelling/fluctuation

Each ring includes one complimentary resize within six months of purchase, should a size adjustment be needed.

All orders are fully insured during transit. In the rare event a package is lost or damaged in shipping, we will work with the carrier and remake the piece as needed.