Design your perfect ring
Certified lab-grown diamonds with maximum sparkle, hand-curated settings.
Design your ringNo account needed · Done in minutes
Why Credexium
We removed every bad option
Buying an engagement ring shouldn't require a gemology degree. We did the homework so every choice in the builder is one you can feel confident about.
Every diamond is GCAL 8X®
The strictest cut certification in the industry — only the top ~1% of diamonds earn it. We don't carry anything less, so you can't pick a dull stone.
See how GCAL grades 8X →Curated, not overwhelming
No endless filters or 500-stone spreadsheets. We show you the single best diamond at each size for your budget. Every option is a good option.
Picked for the hand, not the paper
We select stones by how they actually look on the finger — proportions and face-up size — not just certificate grades that no one can see.
Honest pricing
The same certified lab-grown diamonds and 14K gold or platinum settings you'll find at major chains — typically at a fraction of the price.
We tell you to try it on first
Save your design, then go try a similar ring at a jeweler near you. We'd rather lose a sale than sell you a ring you regret.
Nothing is locked in
Edit your saved design anytime. Not sure of the ring size? A ~$6 ring sizer from Amazon settles it in a day or two.
Order a ring sizer →Honest pricing
Why our rings cost so much less
It's not a lower-quality ring — it's a shorter path from the diamond to your hand.
No brick-and-mortar
No showrooms, no mall rent, no sales commissions. None of those costs end up hidden in the price of your ring.
No inventory
We don't buy diamonds and mark them up while they sit in a case. Your stone is sourced live when you order — you pay for the diamond, not its storage.
An algorithm that shops harder than you do
Our curation engine scans every certified 8X stone and picks the one with the best proportions at the best price — not the one a salesperson needs to move this month.
The same ring, side by side
Credexium
~$4,500
- GCAL 8X® cut — guaranteed
- Colorless certified lab-grown
- 14K gold or platinum
Typical mall jeweler
~$6,200
- ✕Top cut grade not guaranteed
- ✕Store overhead in the price
- ✕Commission-driven selection
Every center diamond is guaranteed maximum sparkle. The GCAL 8X® cut grade means every facet is angled to return the most light possible — a standard most chains don't certify at all.
Why lab-grown
A $15,000 look. Without the $15,000.
Lab-grown is the reason we can put the world's best-cut diamonds within reach. Same carbon, same brilliance — grown in weeks instead of mined over billions of years.
Every stone is certified
You receive the full GCAL grading report with your ring — documenting the 8X® cut, color, clarity, and carat of your diamond.
The same stone, atom for atom
Natural and lab-grown diamonds are both pure crystallized carbon. Same hardness, same fire, same sparkle — a gemologist can't tell them apart by eye.
Usually ~90% less
A lab-grown diamond typically costs a fraction of an equivalent mined stone — the look of a $15,000 diamond for $2,000 or less.
The top 1%, made affordable
Because the stone costs so much less, you can afford the very best cut — the top ~1% of diamonds in the world, on a real-person budget.
Better for the environment
Grown above ground with a fully traceable origin — no mining, and a fraction of the land and water impact.