If you’re comparing lab-grown vs natural diamonds and wondering if lab-grown are “real,” here’s the short answer:
Lab-grown diamonds are real diamonds.
Same carbon, same hardness, same sparkle. The only difference is where they grow—underground vs inside a controlled lab.
Below is a clear, no-BS breakdown of what they are, how they’re made (CVD vs HPHT), and what actually matters when you’re buying.
What Is a Lab-Grown Diamond?
A lab-grown diamond is a diamond made of pure carbon arranged in the same crystal structure as a natural diamond.
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Hardness: 10 on the Mohs scale (same as natural)
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Same refractive index and fire → same sparkle
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Conducts heat like a natural diamond → passes most “diamond testers”
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Can be certified by the same labs (IGI, GIA, etc.)
It’s a diamond. The lab part only refers to its origin, not the material.
Lab-Grown vs Natural Diamonds: What’s the Difference?
What’s the same
Lab-grown and natural diamonds share:
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Appearance – When cut well, they look the same to the naked eye.
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Durability – Both are suitable for daily wear (rings, studs, bracelets).
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Grading – Both can be graded for color, clarity, cut, and carat by major labs.
What’s different
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Origin
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Natural: formed deep in the earth over billions of years.
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Lab-grown: grown in a controlled environment using specialized equipment.
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Price
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Lab-grown diamonds usually cost significantly less than natural diamonds of the same specs.
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That price difference is why you can often go larger or higher quality for the same budget.
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Resale Market
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Natural diamonds have a long-established resale and trade-in market.
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Lab-grown resale is still developing and is generally weaker. Buy lab-grown for personal enjoyment, not future resale.
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Inclusion Patterns & Growth Lines
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Under magnification and with special tools, gemologists can see different growth structures and inclusions in lab-grown stones (especially when identifying CVD vs HPHT).
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To most people looking at your jewelry on the ear or hand, the only noticeable difference is how big and how bright the stone looks for your budget.
Are Lab-Grown Diamonds “Fake”?
No. “Fake” would be glass, CZ, or moissanite.
Lab-grown diamonds are chemically and physically diamonds.
What they are not:
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They are not moissanite.
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They are not “diamond simulants.”
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They are not a coating or plating.
If a lab-grown diamond has a proper certificate, it’s clearly labeled as laboratory-grown to keep everything disclosed and transparent.
How Lab-Grown Diamonds Are Actually Made
There are two main methods:
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HPHT (High Pressure High Temperature)
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CVD (Chemical Vapor Deposition)
Both start with a tiny sliver of diamond called a seed.
1. HPHT Diamonds: Recreating Earth’s Pressure
HPHT tries to mimic how diamonds form naturally underground, but in a controlled press.
Basic steps:
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A small diamond seed is placed in a press with carbon and a metal catalyst.
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The machine applies extreme pressure (over 5 GPa) and temperature (over 1,300°C).
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Carbon melts and crystallizes around the seed.
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Over days to weeks, a larger diamond crystal grows.
Typical traits of HPHT diamonds:
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Often show a slightly warmer tone if nitrogen is present (unless specifically grown to be colorless).
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Can show characteristic inclusion patterns and growth zoning under magnification.
HPHT is also used to treat some natural diamonds to improve color, which is why proper disclosure and certification are important.
2. CVD Diamonds: Growing Diamonds From Gas
CVD takes a different approach—building a diamond layer by layer from a carbon-rich gas.
Basic steps:
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A thin diamond seed plate is placed in a vacuum chamber.
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The chamber is filled with gases (often methane and hydrogen).
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Energy (microwave/plasma) breaks the gas apart.
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Carbon atoms land on the seed and bond to it, forming diamond, one atomic layer at a time.
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Over time, the diamond grows thicker into a usable crystal.
Typical traits of CVD diamonds:
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Often very high clarity and can be grown with bright white color.
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Under lab equipment, they show distinctive growth patterns and sometimes color zoning that differ from HPHT or natural stones.
After growth, many CVD diamonds are further refined (e.g., HPHT post-treatment) to fine-tune color.
Lab-Grown Diamonds vs Moissanite & Other Simulants
Quick comparison so there’s no confusion:
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Lab-grown diamond → real diamond, grown in a lab.
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Moissanite → a different gemstone with more fire and a different refractive index.
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Cubic zirconia (CZ) → man-made simulant, softer and less durable.
If you want diamond performance, choose a lab-grown or natural diamond—moissanite and CZ behave differently under light and wear.
Why People Choose Lab-Grown Diamonds
Most clients choose lab-grown diamonds because they want:
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More size or higher specs (color/clarity) for the same budget.
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The look and performance of a diamond without paying natural diamond pricing.
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Clean, transparent documentation about what they’re buying.
The key is the cut quality. A well-cut lab-grown diamond will always look better than a poorly cut natural stone.
How to Shop Smart for Lab-Grown Diamonds
When you compare lab-grown diamonds, focus on the same key factors as natural:
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Cut – Aim for Excellent/Ideal. Cut has the biggest impact on sparkle.
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Color – Choose a range that looks bright and white in real life, not just on paper.
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Clarity – Eye-clean is what matters. Higher clarity grades can be nice, especially in studs where stones are close to the face.
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Certification – Look for reputable labs (e.g., IGI, GIA) with clear grading and laser inscriptions.
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Setting Quality – Strong prongs, clean polishing, and well-built mountings matter just as much as the stone.
How We Work With Lab-Grown Diamonds at Source Jewelry
At Source Jewelry, we treat lab-grown diamonds as precision-engineered materials:
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Stones are selected based on cut, color, clarity, and consistency, not marketing fluff.
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We inspect and set them in-house in Los Angeles for tight, secure settings.
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Every piece is designed in CAD so the metalwork actually matches the stone dimensions and holds them properly.
The result: clean, modern jewelry with bright, white diamonds that hit hard for their size and budget.
