1CaratDiamond lets you buy IGI-certified lab-grown diamonds online, direct from source, ethically sourced and conflict-free. Take your stone to any jeweller, or work with our own in-house designer, to create the ring, necklace or bracelet you actually want, at wholesale-direct prices a traditional showroom simply can't match.
Every stone is sourced to order directly from our partner cutting houses and mines, then shipped to you insured. That's how we cut prices without cutting quality.
Browse our diamonds, or request a specific shape, colour, clarity, or carat weight.
Your stone is selected and prepared directly by our diamond partners, so nothing sits in a warehouse marking up the price.
Every diamond is independently graded by IGI before anything ships.
Bring your stone to any jeweller you like, or book our in-house designer to create a bespoke ring, necklace or bracelet built around it.
Every stone below is real and individually vetted from our supplier's current inventory, not a generic listing. All are lab-grown diamonds (CVD-grown), chemically, physically and optically identical to mined diamonds, each around 1 carat and IGI certified. Each price is calculated from that stone's exact carat weight and includes insured worldwide shipping. Filter by shape or colour, open a stone for its full specification and 360° view, then request its certificate to reserve it and we'll follow up with you directly.
*Live availability and final pricing are reconfirmed with our supplier at order time. Photos and 360° views stream directly from our supplier's certified media platform (v360) and IGI's own certificate lookup. If an image or video fails to load for a particular stone, its full specification and certificate are still available on request.
Our online catalogue focuses on stones around 1 carat, the size we can price transparently and ship with confidence. For 2, 3 carats or beyond, our sourcing team searches our network personally and comes back to you with matched, certified proposals.
Our name isn't a coincidence. It's a deliberate position on the size of diamond we believe is right to sell.
Around one carat is the size most people already picture when they picture “a diamond”: the benchmark generations of natural stones have made familiar, and still a meaningful, hard-earned purchase at retail for most households. It's substantial, it's classic, and whether natural or lab-grown, nobody looking at it wonders why you're wearing it.
Larger stones tell a different story. A natural diamond of two or three carats sits in a price bracket only a small share of buyers ever reach, so a stone that size, whatever its actual origin, tends to invite curiosity: about the cost, about how it was afforded, sometimes about whether it's even natural at all. That's a conversation about status, not about the stone, and it's not one we think jewelry should have to have.
By concentrating on ~1 carat, every diamond in our online catalogue sits at a size that simply reads as a beautiful stone. Each one is IGI-certified and its origin, natural or lab-grown, is always disclosed in full on the report; we believe in transparency, not concealment. What one carat gives you is something else entirely: the confidence that the only story your diamond tells is the one you want it to.
None of this means larger stones are off the table, it's why our catalogue isn't the only way to buy from us. A request above 1 carat simply moves from instant, self-service browsing to a personal search: our sourcing team looks for the specific stone you want and comes back to you directly with matched, certified proposals.
The size most people already picture when they picture "a diamond." Natural or lab-grown, it simply reads as a beautiful stone, never a statement about what it cost. Browse the catalogue and buy online in minutes.
A size worth pursuing on its own terms. Tell our sourcing team what you're after and we'll search our network personally and bring back matched, certified proposals. Request a custom diamond →
Inclusions become harder to see as you move right; every stone we offer is VS1 or better, already eye-clean.
Want the full IGI certificate or have a question before you buy? We'll get back to you directly, no obligation.
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A 1CaratDiamond stone is meant to be worn every day, set the way you choose, by the jeweller you choose.
Alongside loose stones, we design and offer our own finished jewelry. Exact pieces and pricing are being finalized, and the categories below will be filled in shortly.
Engagement, solitaire and statement rings. Designs to be added.
Coming soon
Pendants and chains built around a single signature stone. Designs to be added.
Coming soon
Tennis, bangle and charm styles set with certified stones. Designs to be added.
Coming soonBuy a certified stone and take it anywhere, or let our own designer build the ring, necklace or bracelet around it, from a consultation or a reference photo.
Meet with our designer (in person or by video call) to talk through your stone, your budget and the piece you have in mind, and you'll leave with a clear direction and a quote.
Request an AppointmentAlready know what you want? Send a photo, sketch or link of the ring, necklace or bracelet you're picturing, and our designer will come back with a custom quote.
Submit a ReferenceEvery diamond we sell is independently graded by IGI before it ships, and the full certificate is yours to keep.
Answers to the questions we hear most before a first order.
Because we source each stone to order directly from our diamond partners instead of pre-buying and warehousing inventory, we avoid the holding costs and markup that traditional showrooms pass on to customers. It also means every stone can be matched precisely to what you need (shape, colour, clarity and carat weight) rather than choosing from whatever happens to be in a display case.
Every diamond in our inventory is lab-grown (CVD-grown): chemically, physically and optically identical to a mined diamond, with its origin always disclosed in full on the IGI report.
Every diamond is independently graded by IGI (International Gemological Institute), covering the 4Cs, natural vs. lab-grown origin, and fancy colour grading where applicable. Every diamond in our inventory is priced individually by carat weight; open any stone and request its certificate directly, and we'll get back to you with the full IGI report and confirm availability.
Yes. We work only with partners who can account for the chain of custody of their stones, and every diamond we offer is conflict-free.
All orders ship fully insured worldwide, and we offer a 30-day return guarantee on every stone. Exact carriers, delivery times and duties by destination will be published here before launch.
Yes, that's the point. We supply the certified loose diamond; you choose the jeweller and the design, so the finished piece is entirely your own.
Yes. Through our Custom Design service you can book a consultation with our in-house designer, or send a photo or sketch of the ring, necklace or bracelet you have in mind, and we'll come back with a tailored quote.
The traditional diamond trade moves a stone through a long chain of dealers before it ever reaches a customer: a cutter, a wholesaler, an importer, a showroom, and every link adds its own margin.
1CaratDiamond was built to shorten that chain. We work directly with a trusted network of diamond cutters and dealers and source each stone to order, so you gain access to fine, independently IGI-certified diamonds at genuinely fair prices. Then bring your stone to the jeweller of your choice, or to our own designer, to create a ring, necklace or bracelet that's entirely your own.
Explore Diamonds
Buying guides and gemology articles to help you choose with confidence, published as the site goes live.
The 4Cs explained, plus how fancy colour and natural vs. lab-grown origin are graded on your report.
Composition, value and why a lab-grown diamond is chemically and optically identical to its mined counterpart.
What actually drives a diamond's price, and which of the 4Cs to prioritise for your budget.
Enquire about a diamond or custom piece, or tell us the shape, colour, clarity, and carat weight you need, and we'll source it to order.
