Lab grown diamonds are real diamonds — chemically, physically, and optically identical to mined diamonds — that are grown in controlled laboratory environments rather than formed in the earth. They are graded by the same gemological authorities (GIA and IGI), measured by the same 4Cs (cut, color, clarity, carat), and look identical to mined diamonds in everyday wear. The only meaningful difference is origin and price: lab grown diamonds typically cost 60-80% less than mined diamonds with the same specifications. This guide is the definitive 2026 explanation of what lab grown diamonds are, how they're made, why they cost less, what to look for when buying, and the questions buyers most often ask before choosing one.
Last updated: April 2026 by the Mohana Jewels editorial team.
What is a lab grown diamond, exactly?
A lab grown diamond is pure carbon — atomic symbol C — arranged in the same crystal structure as a mined diamond, with the same hardness (a perfect 10 on the Mohs scale), the same refractive index (2.42), the same dispersion (the "fire" that gives diamonds their color flashes), and the same density. Place a 1 carat lab grown diamond next to a 1 carat mined diamond of the same cut, color, and clarity, and even a trained gemologist cannot tell them apart by eye, by weight, or with standard jewelry tools.
The Federal Trade Commission (FTC) recognizes lab grown diamonds as real diamonds. Both GIA (Gemological Institute of America) and IGI (International Gemological Institute) grade them using the same 4Cs framework as mined diamonds, with certificates that document each stone's exact specifications. The only thing that distinguishes a lab grown diamond from a mined one is how it was created.
Other names you'll see used for lab grown diamonds — all referring to the same product:
- Lab created diamonds
- Cultured diamonds
- Synthetic diamonds (technically accurate, but the word "synthetic" misleads many buyers into thinking they're not real — they are)
- Engineered diamonds
- Man-made diamonds
- CVD diamonds or HPHT diamonds (referring to the production method)
How are lab grown diamonds made?
Lab grown diamonds are produced using one of two scientifically validated methods. Both produce real diamonds; the difference is in the conditions used to grow the crystal.
1. HPHT — High Pressure, High Temperature
HPHT recreates the conditions deep within the earth where natural diamonds form. A small diamond seed crystal is placed inside a chamber along with a carbon source (usually graphite) and a metal catalyst. The chamber is then subjected to extreme pressure (around 5-6 GPa, equivalent to roughly 50,000 times atmospheric pressure) and extreme temperature (1,300-1,600°C). Under these conditions, the carbon dissolves into the molten metal, then crystallizes onto the diamond seed, growing the stone atom by atom over several days to weeks.
HPHT was the first commercially successful method for growing diamonds, originally developed in the 1950s for industrial applications. Today's HPHT process produces gem-quality diamonds in a fraction of the time it would take to form one in nature.
2. CVD — Chemical Vapor Deposition
CVD takes a different approach. A diamond seed is placed inside a vacuum chamber, which is then filled with a carbon-rich gas (usually methane mixed with hydrogen). The gas is heated by microwave or plasma to extreme temperatures, breaking down the methane molecules and releasing carbon atoms. These atoms then settle onto the diamond seed, building up the crystal layer by layer.
CVD typically takes 4-6 weeks to grow a 1-carat diamond. The process produces highly pure diamonds with fewer trace impurities than HPHT, which is why CVD is often the preferred method for fancy color lab grown diamonds (especially yellows and pinks).
Both methods produce real diamonds. Both are GIA and IGI certified. Most retailers — including Mohana Jewels — work with both HPHT and CVD diamonds depending on the cut, color, and quality required for each piece. Read more about how our diamonds are produced.
Are lab grown diamonds real diamonds?
Yes — and this is the single most important thing to understand. Lab grown diamonds are not imitations, simulants, or fakes. They are real diamonds, classified as such by:
- The Federal Trade Commission (FTC) — officially recognizes lab grown diamonds as real diamonds and prohibits retailers from misleading consumers otherwise
- GIA and IGI — the world's most respected gemological grading authorities, both grade lab grown diamonds using the same 4Cs framework as mined
- The Federation of European Jewellery — the European industry standard recognizes lab grown as diamonds
- Standard diamond testers — devices that detect thermal conductivity (the most common authentication tool) read lab grown diamonds as real diamonds, because they are
This is fundamentally different from cubic zirconia, moissanite, or other diamond simulants — which are different materials entirely (zirconium oxide and silicon carbide, respectively) and can be distinguished from real diamonds with simple tools. Lab grown diamonds cannot. Read our complete guide to whether lab grown diamonds are real diamonds for the full breakdown.
How much do lab grown diamonds cost compared to mined?
Lab grown diamonds typically cost 60-80% less than mined diamonds of the same specifications. Here's a realistic price comparison for the same cut, color, clarity, and carat weight:
- 1 carat round brilliant, F color, VS1 clarity: Lab grown $1,200-$1,800; mined $4,500-$7,000
- 2 carat round brilliant, F color, VS1 clarity: Lab grown $3,500-$5,500; mined $18,000-$30,000
- 3 carat round brilliant, F color, VS1 clarity: Lab grown $7,000-$10,000; mined $40,000-$70,000
- 4 carat round brilliant, F color, VS1 clarity: Lab grown $11,000-$16,000; mined $60,000-$100,000+
The price gap widens significantly at larger carat weights — a 4 carat lab grown diamond often costs less than a 1 carat mined diamond. This is what makes it possible for couples today to wear engagement rings that would have been completely out of reach with mined stones.
Why is the price difference so large? Mined diamond pricing reflects scarcity, mining costs, marketing infrastructure (the famous "diamond is forever" advertising campaign represents decades of accumulated brand investment), and a multi-tier wholesale distribution chain. Lab grown diamonds avoid most of these costs — they're produced on demand, with predictable quality, and sold through shorter supply chains. The savings flow back to the buyer.
Can a jeweler tell the difference between lab grown and mined?
No, not by eye and not with standard jewelry tools. The two are chemically and optically identical. Even with 10x magnification under a loupe, the inclusions, color, and overall appearance look the same.
The only way to definitively distinguish a lab grown from a mined diamond is with specialized gemological equipment — devices like the GIA iD100 or the DiamondView, which detect minute differences in growth patterns and trace elements that are invisible under any standard examination. These instruments cost $5,000-$15,000 and are used in gemological laboratories, not at jewelry counters.
What this means practically: in everyday wear, no one — including the person wearing the ring — can tell whether the diamond is lab grown or mined. The visual experience is identical.
Are lab grown diamonds ethical and eco-friendly?
Generally yes — and this is one of the strongest arguments for choosing lab grown over mined.
Ethical advantages
- 100% conflict-free, every time. Lab grown diamonds are created in laboratories, not extracted from regions where mining can fund armed conflict or human rights abuses.
- Fully traceable supply chain. Every lab grown diamond can be traced from grower to cutter to setting. Mined diamonds, even those certified through the Kimberley Process, often have opaque origin chains that mix stones from multiple sources.
- No displaced communities. Diamond mining has historically displaced indigenous and rural communities. Lab production has zero land-use impact on people.
Environmental advantages
- No mining footprint. Lab production requires no excavation, no land disruption, no displaced ecosystems.
- Significantly less water use per carat. Mining a single carat of natural diamond requires hundreds of gallons of water on average; lab production requires a small fraction of that.
- Lower energy footprint when grown with renewable power. The energy intensity of lab diamond production has been a fair concern historically. Today's leading producers (including the labs Mohana Jewels sources from) increasingly use solar, wind, and other renewable energy, dramatically reducing the carbon footprint per stone.
For shoppers who want fine jewelry that aligns with environmental and ethical values, lab grown diamonds are currently the only option that delivers true diamond beauty without the trade-offs of mining. Read our full sustainability story.
How are lab grown diamonds graded? The 4Cs explained
Lab grown diamonds are graded using the same 4Cs framework as mined diamonds, by the same gemological authorities (GIA and IGI). The four characteristics:
Cut
The most important of the 4Cs — and the one that controls how much a diamond actually sparkles. Cut grades range from Excellent to Poor and measure how well the diamond's facets interact with light. A poorly-cut diamond looks dull regardless of its other qualities; an excellently-cut diamond fires with brilliance even in modest light.
Color
Diamond color is graded D (completely colorless) through Z (light yellow or brown). For most engagement rings, D-G appears completely colorless to the naked eye. H-J retains a near-colorless appearance. Below J, faint warm tones become visible.
Clarity
Clarity measures inclusions (internal characteristics) and blemishes (surface characteristics) on a scale from Flawless (FL) to Included (I3). The most common engagement ring grades are VS1-VS2 (very slightly included — invisible without 10x magnification) and SI1-SI2 (slightly included — sometimes visible to a careful eye but generally clean to the naked eye).
Carat
Carat measures the diamond's weight, not its size. One carat equals 0.2 grams. Carat weight affects both visual size and price exponentially — a 2 carat diamond costs significantly more than two 1 carat diamonds of the same quality.
For a complete walkthrough of how to evaluate the 4Cs and choose specifications that fit your budget and style, see our complete diamond guide.
What to look for when buying a lab grown diamond
Lab grown diamond quality varies, just like mined diamond quality. Here's what to prioritize when shopping:
- Insist on IGI or GIA certification. The certificate is your guarantee of the 4Cs. Avoid retailers who sell "ungraded" or "in-house certified" lab grown diamonds.
- Prioritize cut quality. A 4 carat poorly-cut lab grown diamond looks worse than a 1 carat excellently-cut one. Cut is what creates sparkle.
- Stay in D-G color range for an unmistakably colorless appearance, especially in larger carat weights where color shows more.
- VS1-VS2 clarity is "ideal" — eye-clean without paying premium for VVS or Flawless grades you can't see.
- Choose carat weight last. Cut, color, and clarity matter more than going from 0.95 to 1.0 carats.
- Buy from a retailer with clear return policies and real customer service. Online buying is safe — but only with retailers who back up their products properly.
The current state of lab grown diamonds in 2026
The lab grown diamond industry has matured rapidly. A few notable trends as of 2026:
- Quality and consistency have improved dramatically. The lab grown stones available today are noticeably better in cut quality, color saturation, and clarity than what the industry was producing five years ago.
- The price gap has stabilized. After years of falling prices, lab grown diamond pricing has stabilized at roughly 25-40% of mined diamond pricing for equivalent specs. This is unlikely to fall much further — production costs have a floor.
- Fancy colors have become accessible. Yellow, pink, blue, and green lab grown diamonds are now available at prices that allow normal people to wear them. Mined fancy color diamonds remain extremely expensive and largely the domain of collectors and celebrities.
- Major retailers have embraced lab grown. Brands that resisted lab grown a decade ago now offer them prominently. The conversation has shifted from "are they real?" to "which one is right for me?"
- Buyers are increasingly informed. Most shoppers now arrive at the jewelry counter understanding the basics. The question is no longer "what is this?" but "which one fits my values, budget, and style?"
Lab grown vs mined diamonds: which should you choose?
Honest framing: the right choice depends on what you value most. Choose lab grown if:
- You want to maximize size or quality for your budget
- Ethical sourcing and environmental footprint matter to you
- You're comfortable with modern technology in fine jewelry
- You don't believe diamonds should be a financial investment
Choose mined diamonds if:
- The geological provenance and rarity of natural formation matter to you personally
- You're buying for collection or investment purposes (rare, but real)
- Family tradition specifically calls for mined
- You believe the multi-billion-year history of natural diamond formation adds emotional or symbolic weight
Neither answer is wrong. Both are real diamonds. The decision is personal. Read our complete lab grown vs mined diamond comparison for the full side-by-side.
The bottom line
Lab grown diamonds are real diamonds — same chemistry, same brilliance, same certification — grown in controlled labs in 4-10 weeks rather than formed in the earth over billions of years. They cost 60-80% less than mined diamonds of equivalent specifications, are 100% conflict-free, and have a dramatically smaller environmental footprint. They're graded by GIA and IGI on the same 4Cs scale as mined diamonds, and no one — not even a trained gemologist — can tell the difference by eye.
For most couples shopping for an engagement ring or fine jewelry today, lab grown is the choice that maximizes beauty, value, and conscience together.
Ready to explore? Browse our complete lab grown diamond engagement ring collection, view our best-selling pieces, or contact us for a free consultation with our team.
Frequently asked questions
What are lab grown diamonds made of?
Lab grown diamonds are made of pure carbon, just like mined diamonds. They have the same chemical composition (C), the same crystal structure, the same hardness (10 on the Mohs scale), and the same optical properties.
How are lab grown diamonds made?
Two methods: HPHT (High Pressure High Temperature) recreates the conditions deep within the earth, and CVD (Chemical Vapor Deposition) builds diamonds atom-by-atom from carbon-rich gas. Both produce real diamonds in 4-10 weeks.
Are lab grown diamonds real diamonds?
Yes. The FTC, GIA, and every major gemological authority classify lab grown diamonds as real diamonds. They have identical physical, chemical, and optical properties to mined diamonds.
How much do lab grown diamonds cost compared to mined?
Lab grown diamonds cost 60-80% less than mined diamonds of equivalent size, cut, color, and clarity. A 1 carat lab grown engagement ring at Mohana starts around $1,200; the equivalent mined would cost $4,500-$7,000.
Can a jeweler tell the difference between lab grown and mined?
Not visually. Even with 10x magnification, lab grown and mined diamonds are indistinguishable. Specialized equipment like the GIA iD100 can detect minute growth pattern differences, but no everyday tool can.