How to Buy Loose Diamonds Online, According to Jewelry Experts
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There’s no shortage of diamond jewelry online, and there are some stunning styles to choose from, too. But, as much as we love the convenience of a fully formed design, it doesn’t allow you to truly see the stone’s details and ensure you have a diamond that feels as special as the person wearing it. That’s where loose diamonds come in.
Whether you’re designing an engagement ring or adding a custom touch to classic stud earrings, buying loose diamonds lets you make your setting feel more personalized—and knowing where to shop makes the process so much easier.
Best Loose Diamond Stores at a Glance
- Best Loose Diamond Store, Overall: Blue Nile
- Best for Colored Diamonds: Brilliant Earth
- Easiest Shopping Experience: Kay Jewelers
- Best for Shape Variety: Ritani
- Best for Moissanite: Frank Darling
“Finding a diamond that truly speaks to you can be a magical moment—I’ve seen it happen many times, where someone connects with a stone and feels compelled to purchase it, even if they’re not yet sure what they’ll do with it,” says Daniela Tarantino, VP of Merchandising at Blue Nile. “That’s the magic of loose diamonds.” Choosing a stone is a great place to start when designing a custom piece of jewelry, so if you start with a stone that truly resonates and feels like the one, Tarantino adds that it can then be “set into any design of setting that reflects the individual’s personal style and story.”
Aside from customization, there are many benefits to buying a loose diamond vs. a pre-selected diamond that is already set in a design. “Buying a loose diamond gives you a level of intention and transparency that you do not always get when purchasing a finished piece,” says Logan Hollowell, founder and CEO of Logan Hollowell. “You can evaluate the stone on its own merits, really looking at its cut, color, clarity, proportions, and overall life before it is placed into a setting,” she adds. Hollowell calls the diamond the “heart of the piece,” and says choosing to focus on that, then building a design around it—whether it’s for an engagement ring or an heirloom piece—gives you more flexibility and makes it feel all the more personal.
Is It Safe to Buy Loose Diamonds Online?
If you shop from a well-known and reputable retailer, buying loose diamonds online can be very safe. “Online platforms give customers access to thousands of diamonds, along with detailed information, certification, and expert guidance to help them make confident decisions,” Tarantino explains.
Online jewelry companies such as Blue Nile offers a wide selection of diamonds that you wouldn’t otherwise get from an in-store experience, while also providing excellent and knowledgeable customer service to guide you through the process, whether it’s your first time buying a diamond or you’re an experienced jewelry collector. On top of that, many reputable retailers can provide certifications by the Gemological Institute of America (GIA), proving their trustworthiness. “This certification offers further assurance of the diamond’s quality, authenticity, and value, giving customers additional confidence in what they are purchasing,” says Tarantino.
In addition to diamond details, certification, selection, and customer service, Hollowell says to also look at retailers who offer “detailed imagery or video, a clear return policy, insured shipping, secure payment, and full disclosure around whether the diamond is natural, lab-grown, or treated.” It’s also worth looking at the online shopping experience and choosing retailers with a user-friendly loose diamonds page that lets you easily shop by your desired criteria.
What Is the 4 Diamond Rule?
When shopping for loose diamonds (or any diamond jewelry) online, always consider the 4 diamond rule. “The ‘4 diamond rule’ refers to the 4Cs: cut, color, clarity, and carat,” says Annie Chen, SVP of Merchandising at Brilliant Earth. She explains that this is “the universally recognized standard for evaluating a diamond’s quality and value.”
- Cut: The cut is “how well a diamond’s facets interact with the light,” says Chen. She adds that it’s the most important favorite because “it has the greatest impact on sparkle.”
- Color: When shopping for diamonds, color is also important—because not all diamonds are actually completely colorless. “Color measures the absence of color, graded on a scale from D (colorless) to Z,” says Chen.
- Clarity: If you want a perfect stone, you’ll also want to check the clarity, which “assesses internal inclusions or surface blemishes, graded from flawless to included,” Chen explains.
- Carat: The carat size actually refers to the diamond’s weight. While it can affect the overall size of the diamond, there isn’t an exact correlation between the two.
According to Chen, there is no perfect combination of the 4Cs, and it comes down to your personal preference and priorities. If brilliance is more important to you, she recommends prioritizing the cut over everything else. And, if you want more of a presence on your hand, she says you can balance the other Cs to maximize carat weight. “The key is understanding how these four characteristics work together, so you can find the diamond that’s right for you.”
To confirm legitimacy, Olivia Landau, the founder and CEO of The Clear Cut, says, to make sure that the diamond has a GIA certificate and you understand the quality and value of the diamond. “It is best practice to work with a trusted expert or gemologist who can help advise you with your purchase,” she explains.
Pros and Cons of Buying Loose Diamonds
There are lots of benefits to buying loose diamonds, as well as some downsides. First, Kristy Culliane, co-founder of Plum Diamonds, says, “You can pay a lower price for a loose diamond.” This also gives you the freedom to shop around and source someone who can make you a custom setting for the best price, saving you money in the long run. And, if you want even more savings, shopping for loose lab-grown diamonds is another cost-effective solution.
In addition to price, Tarantino says one of the main pros of buying a loose diamond is having more control over the quality of the diamond. “You can choose the exact cut, color, clarity, and carat you want without being limited to what’s already set in jewelry.”
On the contrary, Holloway says this advantage could also be viewed as a downside for some. “The tradeoff is that it can feel more overwhelming if you are not familiar with diamond grading, because you are making more decisions and still need to think through the final setting, craftsmanship, and how the stone will actually be worn,” she explains. “Buying finished diamond jewelry is often simpler and more immediate, especially for someone who wants the romance of a completed design.” However, she adds that, with these pieces, it can be harder to evaluate every detail of the diamond than when the stone is loose.
In some cases, you can buy a diamond online and then turn around and have it set in a design directly on the jeweler’s website. But, if you’re buying a diamond with the intention of creating something completely customized and unique, finding someone who will make a piece of jewelry from your pre-sourced stone can also be tricky if you don’t know where to look. Independent designers such as Marrow Fine — which offers custom designs as well as reimagined heirloom jewelry — can be the best route to take, but you’ll want to make sure they’re reputable before trusting them with your diamond and your design.
Where to Buy Loose Diamonds
Shopping online for loose diamonds is easier than ever with reputable sources that offer both natural and lab-grown diamonds, plus colored diamonds and diamond alternatives like moissanite. Online jewelers like Blue Nile also feature easy-to-navigate web pages that allow you to narrow down your loose diamond search, based on details like desired diamond shape, as well as clarity, color, cut, carat weight, and price range. Here are the best places to buy loose diamonds online.
Return Policy on Loose Diamonds: 30-day returns
Price Range: $2,720-$577,300
Diamond Type: Natural, lab-grown
Return Policy on Loose Diamonds: 30-day returns
Price Range: $260-$197,130
Diamond Type: Natural, lab-grown
Return Policy on Loose Diamonds: 30-day returns
Price Range: $3,120-$387,650
Diamond Type: Natural, lab-grown
Return Policy on Loose Diamonds: 15-day returns
Price Range: $338-$1,800,352
Diamond Type: Natural, lab-grown
Return Policy on Loose Diamonds: 30-day returns
Price Range: $580-$2,100 (for moissanite)
Diamond Type: Natural, lab-grown, moissanite
