Loose Diamonds in Ontario

If you’re searching for the best loose diamonds in Ontario, California, look no further than Diamond & Design Jewelers. Diamond & Design is an independent, family-owned jeweler with
over 25 years of international diamond buying and selling experience. We offer a stunning selection of loose diamonds at our jewelry store here in the Inland Empire, all of which have been handpicked by our exacting diamond experts. Note that the loose diamonds we meticulously select to carry in our jewelry store are not offered online. We have never bought a diamond without analyzing it in person and we wouldn’t ask our customers to either. Visit our jewelry showroom today to see what makes our handpicked loose diamonds stand out from the rest.

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Discover the Most Beautiful Loose Diamonds in Ontario

At Diamond & Design, we do not believe you can understand a diamond’s beauty solely by looking at its grading report. Where a diamond ranks on each of the GIA’s 4Cs can give you a general idea of its quality and appearance, but diamonds with the same grades can actually look very different in person. Things like inclusion placement and the opinions of different diamond graders can create huge disparities between diamonds that are graded similarly. This is why hand selecting the diamonds we carry in our jewelry store is so important to us. You need to view diamonds in person to get a true sense of what they look like. Our buyers search tirelessly for diamonds that maximize their beauty and value. Our expert buyers also never even
consider buying diamonds that they do not personally like.
Our meticulous approach to buying diamonds makes the diamonds we carry in store markedly different from diamonds you may find at other retailers. The diamonds we carry are usually comparable to the most expensive stones online-- yet, ours actually end up costing less, because we purchase these types of premium diamonds directly before they can get on online diamond buying websites.
4-Prong Engagement Ring
Pear Cut Diamond Engagement Ring

Our Selection of Loose Diamonds Ontario

Whether you’re looking for a diamond to use as a center stone, the perfect assortment of diamond side stones, or a high quality diamond to invest in, you’ll find what you’re looking for at
Diamond & Design. We carry a stunning collection of loose diamonds in a diverse range of shapes and sizes. Visit our showroom and be dazzled by gorgeous round cut diamonds and an array of striking fancy shapes. If you’re looking for something highly specific or rare that we do not have in our loose diamond
collection, note that we can help you acquire it. We offer loose diamond and gemstone sourcing services, and we would be happy to help you hunt down your ideal gem.

Our Loose Diamond Trade-In Guarantee

We stand by the quality and beauty of our loose diamonds 100%. That’s why we offer a full value-trade in toward any loose diamond purchase of any shape, carat weight, or quality, as
long as it’s an upgrade. There are no spending thresholds or catches involved in our trade-in guarantee. For example, if you buy a diamond from us for $3,000 and want to get a diamond
that’s $3,100 a decade later, you could trade-in and only pay the difference. It wouldn’t matter if your new diamond had different quality gradings or a different shape. As long as you are upgrading, you’ll get the full value of your original diamond back.
Rings Displayed On Hand
Woman Wearing Jewelry

Full Service Fine Jeweler in Ontario

Diamond & Design Jewelers is a full service jeweler. So, in addition to offering loose diamonds in Ontario, we carry a beautiful selection of designer jewelry and can provide numerous jewelry services. Our fine jewelry collection features a gorgeous assortment of fine diamond jewelry, gemstone jewelry, and gold jewelry designs. We have a particularly expansive selection of high quality bridal jewelry, offering a dazzling array of engagement rings and wedding rings in every style category. Within our diverse assortment of bridal designs, you’ll discover solitaire styles, halo diamond engagement rings, three stone styles, unique modern engagement rings, eternity bands, gemstone wedding rings, vintage-inspired designs, and much more. Then, we also offer many jewelry services, including custom jewelry design. We place a particular focus on creating custom engagement rings and wedding bands, but can create any type of custom jewelry that your heart desires. Other types of jewelry services we can provide include jewelry repair, watch repair, engravings, and appraisals.

Visit Diamond & Design for the Best Loose Diamonds in Ontario

Diamond & Design Jewelers is located in Chino Hills, CA, just southwest of Ontario. Our jewelry
showroom is centrally located within the Inland Empire, making it convenient to our customers
visiting from nearby cities such as Pomona, Montclair, Chino, Upland, Rancho Cucamonga,
Whittier, Diamond Bar, Yorba Linda, Tustin, and Los Angeles.
If you’re planning your visit to Diamond & Design, know that you do not need an appointment to
shop at our showroom. However, we do have appointments available for those who would
prefer to have a more personalized shopping experience. If you’d like to make an appointment,
you can click here to schedule online or call us at 909.393.1016 to schedule over the phone.

Store Hours:

Sunday – Monday: 11am – 6pm
Tuesday – Saturday: 11am – 7pm


4505 Chino Hills Pkwy #C
Chino Hills, CA 91709

Sunday – Monday: 11am – 6pm
Tuesday – Saturday: 11am – 7pm


4505 Chino Hills Pkwy #C
Chino Hills, CA 91709
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Why we won’t ever sell loose diamonds online

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4505 Chino Hills Pkwy #C, Chino Hills, CA 91709
Sunday - Monday: 11am - 6pm
Tuesday - Saturday: 11am - 7pm
2022 Diamond & Design Jewelers.
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