Buying an engagement ring is one of those purchases most people make once, with very little practice beforehand. There's no need to memorize every term the industry uses, but a handful of decisions genuinely matter to how the ring looks, fits, and holds up. Here's what actually matters, in the order we'd think about it.
Start with a real budget, not a rule of thumb
You may have heard you should spend some multiple of a month's salary on a ring. That guidance came from a diamond industry marketing campaign decades ago, not from any financial or practical logic, and it's worth ignoring. A more useful approach: decide what you're comfortable spending on its own terms, then work backward through the diamond and setting choices below to get the most ring for that number. Lab-grown diamonds make this easier, since they cost significantly less per carat than natural stones of the same grade, which usually means more room to prioritize the factors that actually affect how the ring looks.
Choose the diamond: cut matters most
Diamonds are graded on four criteria: cut, color, clarity, and carat, known as the 4Cs. Of the four, cut has the biggest effect on how much a diamond actually sparkles, more than color or clarity grade on their own. A near-colorless (G-J), eye-clean (VS2-SI1) diamond in an excellent cut will look every bit as brilliant as a top-graded stone, for meaningfully less money. We cover this in more depth in our lab-grown vs. natural diamond guide if you want the full picture, including how lab-grown and natural diamonds compare on cost and certification.
Diamond or moissanite?
Most of our ring designs can be built with either a certified lab-grown diamond or moissanite. Moissanite is a different, genuinely hard gemstone (not a diamond simulant) with more visible fire and a significantly lower price point; lab-grown diamond is the closer match to a traditional diamond's look and the one with independent 4Cs certification. If you're weighing the two, our moissanite vs. lab-grown diamond comparison goes through the trade-offs in detail.
Choose a setting style
The setting is what holds the stone and shapes the ring's overall look and durability:
- Prong settings expose the most light to the stone for maximum brilliance, at a slightly higher snag and chip risk on the prongs themselves.
- Bezel settings wrap metal fully around the stone's edge, offering the best day-to-day protection, at the cost of slightly less light entering the sides.
- Halo settings surround the center stone with smaller accent diamonds, making the center stone look larger without increasing its actual carat weight.
- Pavé and eternity bands extend smaller diamonds along the band itself for continuous sparkle, often paired with a solitaire center stone.
Choose a metal
Metal choice is mostly about color, durability, and skin sensitivity rather than diamond performance:
- Platinum is the most durable and hypoallergenic option, with a naturally white tone that doesn't fade, at a higher cost than gold.
- White gold gives a similar look to platinum for less, though its rhodium plating wears over years and needs occasional re-plating.
- Yellow and rose gold don't require replating and offer a warmer tone that some diamond shapes (cushion, radiant) suit particularly well.
- Gold karat (9K-18K) is a purity and durability trade-off: higher karat gold is purer in color but softer, so 14K is a common middle ground for daily-wear rings.
Get the sizing right before you order
Ring size is the one variable that's genuinely hard to guess and easy to get wrong from a distance. If you're buying as a surprise, borrowing a ring the person already wears on that finger (even a cheap one) and having a jeweler measure it internally is far more reliable than guessing from a size chart. Most rings can be resized after the fact, but resizing works better with some settings (plain bands) than others (full eternity bands with stones all the way around), so it's worth checking before you order rather than after.
Certification matters more than the certificate itself
An IGI or GIA certificate confirms an independent lab, not the seller, graded the stone's actual cut, color, clarity, and carat. It matters less as a document to frame and more as a way of knowing the diamond is what it's represented to be, which becomes relevant for insurance and any future resizing or resetting work.
Consider going custom
If you have a specific stone shape, setting style, or metal combination in mind that doesn't match an existing design exactly, a custom build lets you choose each element independently rather than compromising on a fixed design.
Frequently asked questions
How much should I actually spend on an engagement ring?
Whatever you're genuinely comfortable spending, decided independently of any "rule of thumb" percentage of income. Lab-grown diamonds typically stretch that budget further than natural stones of the same grade.
What ring size should I order if I'm not sure?
Don't guess. Borrow a ring the person wears on that finger for an accurate internal measurement, or wait until you can ask directly, most rings can be resized later if needed.
Is a bigger carat always better?
Not necessarily. A well-cut diamond in a flattering setting often reads as more brilliant and more "impressive" than a larger stone with a mediocre cut.
Can I customize an existing ring design?
Yes. Most of our ring designs can be adjusted in metal, stone shape, and diamond-or-moissanite choice, and a fully custom build is available for anything outside that range.
Start browsing
Explore our full Lab Diamond Rings collection, or start from scratch with our custom design service.