What Is a Lab Grown Diamond?
A lab grown diamond is a real diamond created in a highly controlled laboratory environment using advanced technology that replicates nature's process.
The creation begins with a tiny carbon seed—the same element found at the heart of natural diamonds. This seed is placed in a specialized growth chamber where, layer by layer, pure carbon crystallizes around it, forming a rough diamond crystal. Once fully grown, the diamond is cut and polished by expert artisans using the same techniques applied to mined diamonds.
The result? A diamond that is physically, chemically, and optically identical to one formed deep within the Earth—but created above ground in a matter of weeks rather than billions of years.
Lab Grown Diamonds at 25Karats
Quality, value, and conscience—all in one brilliant choice. Discover our collection of certified lab grown diamond jewelry with savings up to 60%.
Engagement Rings
Begin your journey with a stunning lab grown diamond. Classic solitaires to modern halos—find your perfect symbol of love.
Explore Rings →Anniversary Jewelry
Celebrate your milestones with eternity bands and three-stone designs that honor your enduring love story.
Shop Anniversary →Wedding Rings
Celebrate your union with elegant wedding bands featuring lab grown diamonds. Classic, modern, or eternity styles to match your commitment.
View Collection →Search Thousands of Loose Lab Grown Diamonds
Create something custom or upgrade an existing piece. Filter by shape, carat, cut, color, and clarity to find your ideal stone.
Browse Lab DiamondsIGI & GIA Certified
Every diamond 0.25ct+ includes certification with detailed grading reports.
40-60% Savings
Exceptional value without compromising on quality or brilliance.
Expert Guidance
Our specialists help you find the perfect diamond for your vision and budget.
Eco-Conscious
Sustainable choice with minimal environmental impact—real diamonds, modern values.
The Technology
Our lab grown diamonds are created using two advanced methods: High Pressure-High Temperature (HPHT) and Chemical Vapor Deposition (CVD). Both processes replicate the natural conditions that form diamonds deep within the Earth, but with far greater precision and a significantly smaller environmental footprint.
The result is exceptional purity. Our lab grown diamonds achieve Type IIa classification—a distinction held by less than 2% of mined diamonds. Type IIa diamonds are among the rarest and most valuable in the world, prized for being virtually free of impurities that can affect clarity and brilliance.
Lab Grown Diamonds vs Mined Diamonds
Lab grown diamonds are identical to mined diamonds in every measurable way—sharing the same chemical composition, crystal structure, and brilliance. The only difference? How they're created.
What sets lab grown diamonds apart is their exceptional value. You'll enjoy 40-60% savings compared to mined diamonds of equal quality, while often achieving superior purity and clarity. Our diamonds meet a level of quality found in less than 2% of mined diamonds—the kind typically reserved for the world's most expensive stones.
With lab grown diamonds, you get more size, better quality, and greater sparkle for your budget—all while making a responsible choice for the planet.
Lab Grown Diamonds vs Diamond Simulants
Lab grown diamonds are real diamonds—not imitations. Diamond simulants like moissanite and cubic zirconia may look similar at first glance, but they're completely different materials with different properties. They lack the hardness, brilliance, and lasting value of an actual diamond.
A lab grown diamond, however, is a genuine diamond in every way. It has the same durability, fire, and sparkle as a mined diamond, with the added benefit of being an environmentally responsible choice.
When you choose a lab grown diamond, you're getting the real thing—not a substitute.
Certified
Lab grown diamonds are not only identical to mined diamonds, they also come with a certification by an
independent grading lab showing 4Cs,
just like a mined diamond. 0.25ct and larger grown diamonds are also laser inscribed on the girdle with
certification number.
