Lab-Grown vs. Natural Diamonds

A diamond is one of the most meaningful things you'll ever buy. And somewhere in the middle of that search, almost everyone hits the same fork in the road: lab-grown or natural?

The answer isn't as simple as one being "better" than the other. What surprises most people is that both are real diamonds — chemically, physically, and optically identical. You could put them side by side and not see a difference with the naked eye.

But identical isn't the whole story. Lab-grown and natural diamonds differ in price, color options, rarity, environmental impact, and long-term value in ways that actually matter depending on what you're looking for. Here's everything you need to know to decide.

Lab-Grown vs. Natural Diamonds: Similarities and Differences

Quality and Appearance

Composition and Durability

Most people are shocked to learn that lab-grown and natural diamonds aren't just similar, they're structurally identical. Both are pure crystalline carbon, and both score a 10 on the Mohs Hardness Scale, the highest rating possible. That means equal resistance to scratching, equal durability for everyday wear, and no compromise on the thing that makes a diamond a diamond in the first place.

Brilliance

The sparkle is the same, too. Lab-grown and natural diamonds share the same refractive index (2.417 to 2.419), which is what drives a diamond's light performance. Even professional gemologists can't tell them apart with the naked eye. Instead, they need specialized equipment to detect subtle differences in crystal growth patterns. But from across a dinner table, they are, for all practical purposes, identical.

Color Options

Natural diamonds form in a limited range of colors. Blues, pinks, and yellows exist, but they're rare and priced accordingly. Lab-grown diamonds offer a wider variety of shades, and because they're produced in a controlled environment, the color tends to be more consistent. If a specific color is important to you, lab-grown often gives you more to work with.

Grading and Certification

Both lab-grown and natural diamonds are certified by the same institutions — theGIA (Gemological Institute of America) and theIGI (International Gemological Institute) — and graded on the same four criteria:

• Cut — How well the diamond has been shaped and faceted to maximize light performance
• Color — How colorless the stone is, graded on a scale from D (colorless) to Z (light yellow)
• Clarity — The presence or absence of internal inclusions and surface blemishes
• Carat — The weight of the diamond, which correlates with size

The grading report will also note whether the stone was earth-mined or laboratory-grown, so there's no guesswork involved. Whichever direction you go, always ask for a certified stone. It's the clearest way to know exactly what you're buying.

Price

Natural diamonds are rare, and that rarity comes with a cost. They take billions of years to form underground and require significant resources to mine, which is why they carry such a high price tag. Lab-grown diamonds follow a different path entirely. Produced in days to weeks using Chemical Vapor Deposition (CVD) or High Pressure High Temperature (HPHT) technology, they've become increasingly accessible as manufacturing has scaled and improved. Because of that, lab-grown diamonds typically cost 50 to 80 percent less than a comparable natural stone, which opens up a lot of options for buyers who want more flexibility on size or quality.

Long-term Value

Price and value aren't always the same thing. Natural diamonds have a long track record of holding their worth, and rare or high-quality stones can appreciate over time. Lab-grown diamonds, because of their growing availability, tend to depreciate more significantly. For buyers who think of a diamond as an heirloom or a long-term investment, the premium of a natural stone often makes sense. For those who want maximum size and quality at an accessible price point, lab-grown is a strong choice, as long as resale value isn't the primary concern.

Ethical Sourcing

For many buyers, the question of where a diamond comes from matters just as much as how it looks. Conflict diamonds, sometimes called "blood diamonds," are mined in war zones and used to fund armed conflict. Industry certifications like theKimberley Process were created to address this, and select retailers make a commitment to only selling natural diamonds that are ethically sourced. 

Lab-grown diamonds sidestep the issue entirely. Because they're produced in controlled laboratory environments, their origin is clear and verifiable, and they are inherently conflict-free.

Ultimately, the right diamond is the one that fits your values, your vision, and the moment you're marking. At Milano Jewelry, we're here to help you find it.

Find Your Diamond With Milano Jewelry

At Milano Jewelry, we believe both lab-grown and natural diamonds offer exceptional quality, beauty, and value. We offer both natural, conflict-free diamonds and lab-grown diamonds, so you can shop based on what actually matters to you, whether that's origin, price, size, or something else entirely. If you'd rather start from scratch, our Ring Builder lets you design a completely custom piece from the ground up.